I can't say that I am a fan of the current "rewards" incentives for Mentors, I think the "reward" for being a Mentor should be the satisfaction of helping other players; but that's just my opinion.

Giving a person a "Title" that promotes them being a Mentor, or what we have, "the small crown by the name" to me, seems sufficient. Perhaps, instead of "Rewards" for being a Mentor, the company could say, have points during a year, that they could highlight Mentors and what they do to help the community. More of a community event to recognize and promote the Mentors and the Mentor Program.