Looking for a project that does use an escrow is hard these days. Before it's very essential to see those kind of bounties but things has changed. If the bounty doesn't meet your criteria, don't join them. You have no obligation to join all of them, as long as you are okay with the conditions the bounty you have joined, stay with them. I can understand why many bounty hunters are doing it, joining as many as they can so that the possible paying bounty will increase if they have joined many of them.
but using an escrow in bounty campaign is really possible ? i havent see one myself tbh but im the ones that also lurk on the bounties before . why use escrow when there isnt no coin to escrow yet ? because they dont have thier coins with them or they lock them . some have the coin already but its not listed yet , so useless to escrow the coin without a value . joining multiple bounties is the only thing that a bounty hunter can do so that he can increase his luck of getting payed off .
Yes, before probably you're not a member of this forum during that time. Lots of bounty campaigns that has escrowed the funds for their participants. One idea that will make you believe that is to look for those known escrows and see the history of their escrowing career.
I think you'll see that many of them has escrowed funds from projects and bounties before so that's going to give you an idea that it's really happening. But right now, the projects seem to be lack of that setup and they just want to distribute it on their own which leads most likely to scam.