I want to try some bounty, but many of the bounty is not open for newbie or jr.member, and the income is very low, I think it is not worth spending 2-3 hours per day in order to get some worthless tokens.
You should join other campaigns rather than signature or join the bounties that just has a few participants so your percentage of stakes will be bigger and you can receive more reward. However, this kind of bounty also more risky. And I don't think we have to spend 2 - 3 hours per day to complete the bounty. For me, I just join signature campaigns and spend around 30 minutes - 1 hour per day