To anyone seriously considering spending money with a Mentor, or whatever you want to call it, the very first question you should ask before you even think about opening your wallet is:
Can you show me an example of your success OUTSIDE of the MMO niche?
What this does for you is rule out the 'faked it till they made it' folks. The problem with these guys is the niche they faked it in is one that has DESPERATE buyers. Waaaay easier to sell to and 'fake it' to. Further, if they were a faker, that means they pretty much are willing to lie (or come very close with important omissions of truth) to people to get money from them, and you now just ended up on their list. Tough to fully trust someone like that. [That all is a Generalization, but I feel an accurate one.]
If they can show you an example, take note if it was a pre-Panda and Hummingbird Update success, 'cause that was an entire mini-Era of 'faking' it with BH SEO stuff. If it was something different, like a PPC to direct link aff page, again take note of the time frame (like if it was done before Google put the hammer down - and after that, they couldn't do it and had to switch to the Mentor Niche - Hint, Hint).
If things look okay from there, ask them what their biggest You-Know-What Up was, and what they learned from it.
Be smart. If you are seeking the help of a Mentor (I have no doubt there are some legitimate, experienced type folks out there that are worth it), look yourself in the mirror and tell yourself that you are doing so because you feel you need help. That can make you feel desperate and puts you into an EMOTIONAL BUYING STATE.
Research, ask questions, and give money to a Mentor based upon a LOGICAL purchasing decision, not EMOTIONAL ones.