ICO is all about fund raising to develop their platform and their businesses with other platforms (Partnerships). Raising a bounty is one of the most first step.to call out an investors and they actually save a lot in advertisement by using thousands of freelancers. Those freelancers are the bounty hunters. That good karma you are referring to will follow for sure if that company becomes successful in cryptocurrency.
Okay, but are you ready to comment the actual situation? Those freelancers you are mentioning are usually producing extremely low quality content and sharing the project with absolutely irrelevant friends networks. The real freelancers have for long time raised the quality and established real media quoting much more significant sums for producing content. For what I have experienced, the bounty content is pretty useless.