We don't know what is the real project and scam project, because as of now 90% of all ICO are scam. The one thing i really sure is before you trust on the project, you may know personally the team or meet up them to identify if the identity are real or not and they explain to you the real purpose of the project.
Problem is that even real project doesn't pay for work to bounty hunters. They think it's like free advertising in spite of they promise to pay tokens.
For example, I didn't get any tokens from electroneum. Few times my nickname disappeared from spreadsheets in the end of campaign.
Some campaign is cheating the bounty people without any payment after raising enough money in the market. Some companies are delaying for the payments and will take more than 6 months to distribute the tokens to the bounty participants.