The reason why everyone wants to get paid in bitcoin or ETH is because they don't want to wait when bounty is over,they want quick rewards,i prefer to get paid in tokens because it will be a lot profitable than getting paid in ETH or btc
There are times it works the way you have talked but on many cases as well they turn out to be decorations on our wallets. Not quick reward as such but being sure that your effort will not be a waste at the end of the bounty.