I just do not understand why people would want to work for free without any guarantees at all. If you are really unlucky you could spend 1000s of hours doing work for these bounties and profit nothing. I am interested in hearing about your experience with these bounties and how much you profit when it comes to withdrawing the tokens.
If you want to get value for this work, everyone needs to spend time every day, every week to check the projects. It should be realized that, there are types of bonuses that have their own budget and some projects just try to start a project with fundraising, they don't even have any bounty funding budget. Of those, most are worthless. So, bounty and investing it are almost the same, working and supporting the project that you consider to be quality, you see that the team has their enthusiasm and efforts to go to success. If you decide to support them, forget about the "benefit" or take the risk when it fails.