Blockstack Can't Be Evil Contest
Terms and Conditions
Effective Date: May 8, 2019 at 10:00 a.m. EDT
End Date: June 30, 2019 at 11:45 p.m. EDT ("Submission Period")
ELIGIBILITY: You must be at least eighteen (18) years of age and the age of majority in your jurisdiction of residence to participate in the Can't Be Evil Contest ("Contest"). Only individuals or teams may enroll. Employees and directors of Blockstack PBC, its subsidiaries, and affiliates (collectively "Blockstack"), its advertising and promotion agencies, and their immediate family or household members are not eligible. Void where prohibited or limited by law or where registration,
bonding, or other localization required. By participating in the Contest, you agree to hold Blockstack, its employees, and directors, and its advertising and promotion agencies, harmless in connection with the Contest. Participation in this Contest constitutes your full and unconditional agreement to and acceptance of these Terms and Conditions ("Terms").

CONTEST; HOW TO PARTICIPATE: Participants may enter the Contest at any time during the Submission Period. The steps listed below must be completed during the Submission Period for an entry to be considered. Internet access and a Github account are required to enter.

Step One: Participants must register for the Contest (either as an individual or on behalf of a team of individuals) at and provide all requested information.

Step Two: Participants must build an application using Blockstack authentication.

Step Three: Before the end of the Submission Period, participants must submit their application to Blockstack using the online submission function on the DevPost page and register the application for App Mining using the form located at, filling in all information, and writing "Can't Be Evil" in the "How did you learn about or App Mining?" field.

All three steps must be completed to be deemed an eligible entry.

Participating Team Rules: An individual may enter the Contest as an individual or as part of a team. Each member of a participating team must agree individually to, and comply with, these Terms. Failure by any team member to comply with these Terms may, in Blockstack's sole discretion, result in disqualification of the team as a whole. By entering as a member of a team, each member acknowledges and agrees to the following rules for teams:

  • After the end of the Submission Period, the membership of a team may not be changed.
  • A member of a participating team may not submit any materials on behalf of the team without the agreement of each member of the team.
  • Each member of the team is responsible for ensuring compliance of the other teammates with these Terms, including compliance with any and all submission requirements, regardless of which member creates or submits the materials.
  • If a team is awarded a prize, such prize will be awarded to a representative of the team (the "Team Captain") designated by the team. It is up to the Team Captain to decide how to allocate the prize, and Blockstack will have no responsibility for fulfillment of the prize to any team member other than the Team Captain.
Application Requirements:
All applications must be in English and comply with the following requirements:

  • The application must be built on Blockstack and use Blockstack for identity at a minimum.
  • For the Creative Use of Lightning Category, the application must make use of the Lightning Network.
  • The application must be (1) the original work of the individual participant or the participating team; (2) third-party technology used by the individual participant or the participating team must be subject to valid perpetual, irrevocable licenses.
  • By submitting an application, the individual participant and each member of a participating team, jointly and severally, represent and warrant that the application, and all components thereof, will not violate any rights of any person or entity, including without limitation, any copyright, trademark, patent or other intellectual property rights, or violate any applicable national, federal, state, or local laws, regulations, or policies, including those relating to export control.
Other Entry Terms: Blockstack reserves the right to make modifications to entry, judging, or other criteria (for example, additional clarification or detail for submission requirements) as deemed appropriate by Blockstack in its sole discretion. Blockstack reserves the right to modify or supplement these Terms and to communicate such modifications or supplements to participants, as Blockstack deems reasonable.

An individual participant or a member of a team may submit more than one project to the Contest, but must register each project separately in accordance with the three steps described above. Each project will be evaluated independently.

In the event of a dispute between members of a submission team, the submission will be deemed to have been submitted by the Team Captain, provided that such individual satisfies all other Contest eligibility requirements. If multiple individuals for the same app submission (whether in their individual capacities or claiming to be Team Captains), Blockstack reserves the right to resolve the discrepancy by any means in its sole discretion or to disqualify all related submissions.

Any questions regarding the eligibility or appropriateness of any submissions for consideration in the Contest shall be resolved by Blockstack in its sole discretion. Blockstack reserves the right to disqualify any entries by persons who submit false or misleading entry information or who Blockstack determines to be tampering with or abusing any aspect of the Contest. Blockstack reserves the right to disqualify Participants whose submissions are frivolous or fail to meet applicable requirements.

COMPETITION CRITERIA AND PRIZES: Judging will be conducted by three independent judges, whose decisions will be final and binding on all matters relating to the Contest. Submissions will be evaluated on the basis of the submitted materials via the categories listed at Only materials submitted in accordance with the Terms will be deemed part of the official entry. Any required materials not included in the submitted materials will not be considered.

Blockstack anticipates awarding prizes as described at All prizes and prize amounts are subject to change or cancellation with or without notice in Blockstack's sole discretion.

The winner may be required to complete and promptly submit an affidavit of eligibility and provide other documentation that Blockstack requires to verify eligibility and compliance with these Terms, as well as a liability and publicity release.

Blockstack's inability to reach a potential winner after a reasonable (as solely determined by Blockstack) effort has been made, the failure of a potential winner to timely respond to a prize notification, the return of any prize notification as undeliverable, and/or a potential winner's failure to comply with any term or condition of these Terms may, in Blockstack's sole discretion, result in the potential winner's disqualification. Blockstack in its sole discretion may select a substitute winner by awarding the prize to another member of a winning team or by awarding the prize to the submission that received the next highest score according to the judging criteria. If Blockstack makes a reasonable effort to select another potential winner and that winner does not respond or
is ineligible, the prize will not be awarded and will remain the property of Blockstack.

Taxes and all other costs not expressly specified as provided by Blockstack in these Terms are the sole responsibility of the participants. Prizes are not transferable to any individual or business entity. Blockstack may substitute a prize at any time in its sole discretion, provided that such substitute is of at least the same approximate retail value as the prize described in these Terms.

GENERAL CONDITIONS: By participating or accepting any prize, each participant allows Blockstack the use of the participant's name, photograph, likeness, voice, biographical information, and any content or actions associated with the Contest for publicity and promotional purposes without further compensation where permitted by law. By participating in the Contest, you release and agree to hold harmless Blockstack, its affiliates, subsidiaries, advertising, and promotion agencies and their respective directors, officers, employees, representatives, and agents from any and all liability for any injuries, loss, or damage of any kind to person, including death, and property, arising in whole or in part, directly or indirectly, from acceptance, possession, use, or misuse of a prize, participation in any Contest related activity, or participation in this Contest. Blockstack reserves the right, in its sole discretion, to disqualify any individual it finds, in its sole discretion, to be tampering with the operation of the Contest; to be in violation of the Terms of Use of its website; to be acting in violation of the Terms; or to be acting in a non-sportsmanlike or disruptive manner. If for any reason this Contest is not capable of running as planned, Blockstack reserves the right to cancel, terminate, modify, or suspend the Contest. The Contest and its benefits are offered at the discretion of Blockstack. Blockstack has the right to change, limit, modify, or cancel the Contest, the Terms, prizes, and prize levels at any time, with or without notice. Any and all changes and amendments to these Terms will become binding upon all participants immediately. Neither participation in the Contest nor anything in these Terms entitle you to any vested rights with prizes or Contest benefits.


LIMITATIONS OF LIABILITY: The Contest or any of its features may be unavailable, inaccurate, or interrupted from time to time for any number of reasons. Blockstack is not responsible for any unavailability, interruptions, or errors of the Contest. Blockstack is not responsible for unauthorized use of or loss of prizes. Blockstack makes no representations or warranties of any kind, express or implied, regarding the Contest or any prize, including but not limited to any warranty of merchantability or fitness for a particular purpose. Blockstack will not be responsible for any costs, damages, accident, delay, injury, loss, expense, or inconvenience that may arise in connection with (i) the use of or defect in any prize or (ii) your participation in the Contest.

DISPUTES: Except where prohibited, as a condition of participating in this Contest, participant agrees that any and all disputes which cannot be resolved between the parties, claims and causes of action arising out of or connected with the Contest, or any prizes, shall be resolved as provided in the Blockstack Terms of Use.
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