Unlikely, the more people are involved, the more spam on the social networks and that is what they want, their ico will be for many people.
The purpose of bounty is to makerting and the more participants they promote success
More and more participants and just make spam what's the point?
Better to be limited but choose a member who has higher rank and have good experience in promotion. Better fewer participants have good experience in promotion and have higher previews than many participants but only make spam and only focus on rewards regardless of the quality of their promotions.