If you think I am, follow bounty campaign is a very effective. Especially if you do to fill the free time you have. It is really very useful. You invest for the future. While there are still many opportunities in the bounty campaign, then I think the join as many bounty is the right choice.
I think it will give a good yield. And even if the bounty takes a long time... if you do not pause the work, the pauses are almost invisible.