They are now having a strict policy in order to be accepted on their project I have seen some signature campaign(BTC) that requires 5 or more merit received in the past 120 days,
And when it comes to bounty they are also having some restriction but only for those who have negative trust.
I think sooner or later we would see that the bounty campaign(alt-coins) would also be strict when it comes to rank the BTC campaigns right now only accept members up only and I think the alt-coin campaign would also do it too.
It is noticeable that the campaigns are becoming more strict. However, when it comes to bounty that pays in tokens, for developers the quality of posts is not as important as for projects paying in BTC. I think that the largest number of participants and the largest range of promotion is more important for bounty. Mainly because rates are divided in percents (in stakes) and are not fixed as in BTC paid campaigns.