If told to choose, I prefer old bouties, where the old bounties will definitely get paid and a few cases of scam. New bounties are now a lot of scam cases where it's a waste of time and useless thoughts.
but you have to see how there were not many productive projects in holding a bounty campaign. only a few, and before ICO, several projects also paid bounties with BTC as they are now. but maybe the value is really really very little. because once the bounty didn't really produce before 2016-2017. I see its development is very fast every year.