I want to ask how does the people that do bounty make money.I mean they are giving away money for free.How is it profitable for ICO teams?
Because very less amount of people invest in their ICO through bounty.

it's not profitable for them but advertising through bounty campaigns could result to positive feedback from the community especially if they hired a good bounty manager and a lot of participants especially on signature campaign joined by higher ranking accounts here since some of them knows what's the best project going on so far.