I am also a victim of that korona bounty, what I gathered was that most of some bounty hunter platform are just a waste of time. I believe if u need a cool and awesome bounty platform to join, u can go for amazix or krypical. Both can give u a worthy and reasonable outcome of bounty.
Actually they have so many bounties are trusted but not all, Maybe we should need some research if we need a better bounties that we need to participate for. But we need to be careful to those bounties that if you think are not totally paid.