If you are lucky enough then you could hit few good bounty programs and might just earn around 10K USD in 6 months of period and if you are not good enough to do the work and hit the good bounty then I am sure you will get 1000 USD or around that. Believe me its all about the luck, what kind of bounties you join and how much hard you working for them. Bounties can be blessings at a time and they could be timeless bomb, exploding all the time and every time you work for them. The out put is unsure but as I said it depends on various factors! So no one can tell.