There is no doubt that Advertising through bounty is profitable. I myself buy so many coins and tokens through ICO. Bitcointalk is the best platform most of the people involved in crypt are attached with Bitcointalk. So advertising through Bounty is a good way to approach them.
what if we did't get paid for bounty?
then that company conducted bounty program can be tag as a scam and will have a negative feedback from the community for sure, just to be sure make a background check for the members of the project for you to secure the time and effort you've done advertising their ICO.