I have seen a lot of bounty use escrow, but honestly the result is not so good. There are still many projects that have collapsed and become scams and bounty hunters only get useless tokens and cannot sell them.
Then demand to be paid in existing tokens that are already on the market.
If they can't afford full campaign payment in existing tokens demand half of it to be escrowed. Worst case scenario they'll go bankrupt and you'll get 50% of your payment but at least you will have some money.
I told you all that demanding escrow is a great way to verify the health of the developing team. If they can't afford to escrow 1000 USD to show their good intentions they must be broke and broke teams either go bankrupt or look for a way to scam.