Bounty campaigns are not lucrative enough. I wrote about 50 articles. It's been 3 months and only one has paid so far.
Really waste of time. But you can still try if you have free time.
It's better than not getting anything, yes, if you have plenty of time, you can do bounty but don't expect a lot as 2017 has already passed, that was the golden times of bounty and I don't know if times that like will come again. Just like investing, we risk our money hoping to succeed, but there's also a risk of losing, so in bounty, sometimes you succeed and sometimes you fail, at least you did not risk any money.