Revain previously also organized contests. You can see articles about this in their blog: https://revain.org/blog, if anyone is interested in this.
Here is a similar contest that took place this spring - https://revain.org/blog/revain-author-of-the-month-competition.
What's going on here? Was there scaming by the organizers? Participants received their rewards, then what could be the complaint?
If past competitions were all fair and all participants received a reward, then why would the project team be deceived now? This is stupid and there is no point.