Mate it's being so hard to find any decent bounty since the last 2 years, i can guarantee you that. Being doing this since August 2017, the golden age of bounty hunting where you can make $500+ out of a single Signature Bounty.
Nowadays your work so hard for months, then if the project owners didn't turn into scam, their token may become worth $0 value.
I personally took like a year off of bounties since the IEO is taking over in those major exchanges, so the ICO that neds bounties are doomed to failure or not worth it anymore especially with those Bounty Platforms popping up everywhere that are taking the big portion for themselves.