Well, what can we say. Bounty might be no longer profitable this time, or may be since a year ago perhaps. Only a few of them that can be called successful and most of them were failed/scammed ones.
And regarding the campaign that pays you using bitcoin, a lot of people here suggesting for them using an escrow because bitcoin already has a value, it's different from the bounty of new altcoins/things. They prefer if the team are using an escrow or hiring a reputable manager from here, especially if the one managing the campaign doesn't have name in here.
Because of the market and some scam project, so everything is affected, including investors, bounty hunters, long term holders, so hunters are not alone, if you think that doing bounty doesn't work anymore then you can always find some ways for you to earn, just like doing day trading, doing article content and many more.