1. Seems like a scam. That's $100+ worth of games, and you want $2.50 in MS Points? Plus you only joined this month.
2. No proof on the picture that it's yours - you need to write in text (as in, literally using the computer keyboard in notepad) on the screenshot that it is you.
3. You can't give someone 200 MS Points. You can only give out codes, and they are in increments of 160 (160's are hard to find), 400, 800, 1200, 1600, 2100 and 4000.