It would be cool if Stunna also gave trust feedback in return, but we really are not risking anything. He is paying us to do something we would be doing anyway - i.e. posting on the forum.
Uh huh. And if he didn't pay one month, what would you say? Because rest assured the response here would not be positive.
"Hey, you're not risking anything, you're doing something you would do anyway?'
Let me know how that works out for you.
Hey, if you don't want to do the signature deal, don't do it

I'm sure you can ask for feedback from others.
Feedback should be earned, not just "forced" trust. If Stunna wants to leave feedback, great. If Stunna doesn't want to leave feedback, it's not the end of the world. If you don't like taking this "risk" you are talking about, don't take it.