It's called bounty signature campaings, but they don't force you to write only about their project. You can post whatever you want and thus you advertise a project by wearing their signature. And in most cases it's very profitable both for a project and for a bounty hunter.
True and most of the rules the ICOs offers for their signature campaigns do not require you to even talk to about their ICO specially here in bitcoin talk though it might be different to social media campaigns. What they need is the appearance of their signatures in the specific threads in which those audience that they want to target with. I really think that these bounty campaigns to be profitable too and less much of a hassle than your usual part time job.
