I just dont get the downside here. If you order x number of cards and its legit you have a built in value. Whatever number that may be its still less than 100% of face value. If you make 5% (conservatively) Its a home run. If you make nothing, the MS value is still there. So you make more than your money sitting in the bank at <1%.
If the site is not legit, then its fraudulent charges on your account and youre liable for $50 max on most cards.
I didnt go crazy. I'm at 175 over 3 different cards. so potential at 86% is north of $2400 plus MS value, CB etc for a $5k investment. I can live with that risk/reward potential. 45%+ cash-on-cash.