Do not know if it makes sense for projects. Everybody is struggling to collect a soft cap nowadays, reducing all the caps for bounty hunters. I can hardly imagine a new project that is going to pay from their ICO/IEO money to bounty hunters.
And in return as those projects keep scamming bounty hunters or they reduce their pay after the fact or they change the rules at the end of the campaign we are seeing that bounty hunters are not really interested in participating in those campaigns, and what are they going to do to get such a free advertising? Also many of those that promoted those icos not only invested their time in those icos they also invested their money in them and now that is no longer the case anymore.