Do not waste time with the bounty of new projects at the present time, it is difficult for them to successfully raise funds and pay for the bounty hunter. Try to participate in the bounty of the projects listed at the exchange, you will have a higher chance to receive tokens and can sell them.
Projects that are already listed at major exchanges will usually earn very little, and I've noticed this for over a year. I think if you want to make a lot of money, it is best to participate in new projects, but before participating should evaluate that project many times before joining. Bounty campaigns are no longer the same as before, and if you choose a bad project then you will waste time working there.
Over the past year, successful ICOS can be listed on the fingers of one hand. Accordingly, there are also very few bounties that paid bounty hunters the tokens they earned. But even those tokens that bounty hunters received are usually impossible to sell, because they are not traded anywhere.