To avoid fake activity, only the selected sites/influencers will be allow to promote the campaign.
For example, Legendary members in Bircointalk, although this members could also using some bots to complete the task, but this at least can reduce many of fake promoting. And once we detected the fake activity we will ban the member and announce it in our platform and in Bitcointalk forum.
For example, how you will check social media accounts if they haven't related to the Bitcointalk account?
So, someone had a Twitter acc with 10k followers but never heard of Bitcointalk. I guess it is okay when you need to check manually one or few new accounts, but what when you have 1k new acc to verify, plus 1k new FB acc's, Instagram, Reddit...
I can imagine how much work is behind.