I don't join many bounties, sometimes when I get time I join. If you are joining the real program then obviously we will get your reward. But nowadays many of the bounty programs don't pay a single token.
And also remember, even they will pay your rewards, some of those tokens are still don't have worth for the meantime or even in the future.
A lot of them are just trash and will turn into a scam especially on bear markets, so always beware on those such of bounties where you will just waste your time.
Yeah, I did a bunch of bounties way back 2017-2018 surely some of it was worth it and give a good reward but a lot of it was trash the token don't even reach the market as the lazy developers or team not even trying. Then after a lot of promises from the developer will be gone.
These days I think around 90% of the bounties are already trash and will be a dead token after the bounty and for sure you are not going to be paid.