I've read this somewhere.. that if you use a mail-in rebate, such as the "20$ mail-in rebate" currently with their 6 day anniversary sale and such, that it voids your ability to even step-up your card. I can't seem to find anyone else talking about it anywhere, so I thought I'd just ask here.. sorry if it's a dumb question. I'd just rather not use my rebate if it's the case.. I want to step-up eventually! Thanks guys/gals.