These bounty platforms have 0 trasparence, there is no way to know and verify for sure how many people are participating.
I am struggling to understand what you mean by transparency on this as everything on those platforms are automated... for instance, if you like and share a facebook post, it is recorded automatically and you don't have to post report in the forum. So I will appreciate if you can throw more light on what you mean by transparency.
Those platform are a s**t, since noone can read what one user posts and
IF anyone posts, or what address users use.
I've found in the past a lot of accounts form abusers to joins those campaings (social media, and even signature on forum) by those platforms.
Since the transparency is ZERO a lot of people will abuse and will use more and more accounts to get many tokens as possible, Also since we have no transparency we can't Know if thousands of tokens will end on "shady address with 0 effort but a lot of money".