Ever since I registered to this forum in 2014, I have never taken part in any altcoin bounty campaigns. So I don't have any direct experience with them. I have always preferred signature campaigns, where the reward was either in BTC or ETH. And signature campaigns have been really good for me. I might have participated in at least a dozen of them, and all of them have paid me good rewards.
Nice to hear from you mate, but it's too hard to find those direct btc payment these days because it was so fast to become unavailable due to more participants queing to be accepted. However, with those altcoin bounty campaigns even though it's not certain to be part of those legit one, I guess risking your time was the bottom line here. It's always a matter of trying and don't take it seriously to become as your sustainable income source, but consider it as your alternative ways of earning money as well.