they only pay with tokens, they don't cost a lot, just make smartcotract from eth. for sending tokens are also small. it's just that if their project is successful the token that they make will have great value.
Dude, it's not about what coin/token they paying, but rather about fees while sending the token to all bounty hunters which required few hunderd - thousand dollars.
There was a bounty which successfully collected 100M of dollars but they decided to scam by run away with their project and abandon their bounty hunter. So even a successfull ICO/IEO can't be guarantee you will get paid
DGulari I agree with you, there are no guarantees with any new project. It's the risk
we agree to take when we join some bounty/airdrop.
To add something about the topic, new projects have marketing, bounties should
be just one part of entire marketing. Bounty participants are paid in their token, they
just pay for the sending fees. But some big projects had widely spread marketing,
they couldn't pay that with their token, so they need to spend money on that too.