This is from something called "reward redemption" and states that since you visited an "affiliated website" you are eligible for a $100 REBATE card. Note the emphasis on "rebate", meaning you would have to spend who knows how much on the front end so you can receive the honor of (maybe) getting $100 back. Total spam, and probably scam.
Yeah total scam received it before several times about a month ago and then again today 11/11/2014. they ask for credit card number to pay a small fee to send you this gift card. I spoke with several diff people and they all said diff things. Totally a scam!!!! Beware!!!!