Well, I cannot define how much I get. Because, the bounty payment will be around 2 or 4 months. I commonly join the signature campaign and sometimes making article and videos. But, the most promising bounty campaign is Signature. If I count the rate, it may be around $2k. But of course, it depends on the project success.
Definitely. At joining some bounty campaigns, there are also lots of things to consider, one of which is what you have stated already. And i also think that it cannot be considered as monthly income, because that totally depends upon what kind if bounty you are joining and how is the payment process and rates should be, it could also be depending on how long the campaign takes its place.