It is the most chippest way to pay bounty in tokens. For founders it is not necessary to have fiat for promotion, Just create tokens and pay in them. All risks have the participants in bounty because tokens can become very chip or just have a 0 price.
That means when the token worth penny and the hunters will receive nothing. It's quite better in focusing to escrow the funds rather than try to believe in the team to distributing the reward.
The better thing to focus into the how developer will able to at least escrowing the token or funds to the trusted manager.
hope that there will be changes or implementation of regulations even though it is far from expectations with definite payments such as stable, BTC or others that have value. it will be better and increase the quality of the project. so many times there are many obscure bounty projects that have little big potential.