I think that there nothing you can really do... most of projects are unsuccessful now and also legit ones have many difficulties... I really hope situation will change but now I left more than 70% of bounty campaigns I was making because projects seem dead...
If you are seeing no future about those projects, that's the right thing to do, instead, consume your time with other things that can bring benefits to you
or study much deeper and find project that really worthy to invest your time and effort, somehow there's still good one out there but it's really needs to pay attentions and much clearer views.