Don't do it. It's a scam. Happens all the time...they'll say: "Give me 400 MSPoints to turn it into 1600!" Theyll take them and leave. Nothing you can do about it either cuz microsoft won't care.
Yea, dont except emails or messages liek that, jsut mark it as spam. Something stupid, is right after you say no, your a scammer, they just leave and you never see them online again.
I've had soo many different types of these messages... lee evans is in our game, bill gates is in our game, i will give you 10$ if you join etc. There just little kids trying to gain players