Bubbalex will listen if the bounty allocation is small and many participants are joining, I PMd him about too many participants on Cartesi bounty campaign and he listened, too much participants on a small budget bounty campaigns aren't good
I think he did the same thing with DIA Bounty Campaign. On the first day the bounty thread was opened and on the same day all slot was fulfilled and on the following day the allocation of rewards was increased and also adding a few more slots to the bounty hunter. I think he calculated everything well, when the allocation is too little and too much participation is certainly not a profitable thing for bounty hunters.