From every indication, bounty hunters would prefer to be paid with stable coin. Some hunters may even be willing to collect half the amount in stable coin and carry out same task, but the issue is that most new projects would prefer to pay in their novel tokens Inorder to improve liquidity and circulation of the tokens. Getting a project to pay in stable coin or btc and other popular coin is quite difficult as compared to those paying on their own coin.
It all depends on how confident you are in the project. Now I am 100% confident in my project. It is already traded on the interbank market, has excellent technology and is expected to succeed in this. I don't doubt it. So I'm sure I'll make good money advertising it. And much more if this reward was set in stable coins.