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.

Its not "free" since those amounts being given is already part of their marketing expenses which is normal for a certain project to do such thing.Talking about profitability?They wont exist here and sustain upto these days if they weren't able to raise up money or be profitable.No doubt that they are really profitable on such thing and the number of projects being launch on this forum itself can give you the proofs.