Just be careful because this tactic is known as back door sourcing..
One person will ask a question, and a bunch of new registered users will chime in with nothing but positive reviews..
It appears that the administration gave you approval, but that doesn't mean that they're not looking..
If your intent is genuine, just be careful how you word it so it doesn't backfire..
Just a little tip, it may help you if you mentioned the community that you seen the sponsor on, because a selected few communities that are biased with politics..
But for the most part a good portion of communities are transparent, and all feedback is peer reviewed..
Kudos to you for doing research in a community that is unrelated, or has no affiliation where you have a greater chance of receiving more transparent reviews