I just don't get it, i allow everyone that can write about bitcoin to submit articles with ads and affiliate links, they can become admins, why they don't submit article if they can earn from affiliate links?
I will send 10$ in bitcoin for best advice that will help me to get ahead.
Maybe they think they won't be paid? Happens all the time.
Announce your prize structure and the rules, and put your reward money in the hands of a trusted escrow.