Got the same message about a $100 gift card. The Text came very early, waking me up!!! I had just placed an order on a site the previous day, but after reading these comments, I know it's not related.
Thanks 4 visiting our Website Please call 877 86 8581 to claim your 100.00 walmart voucher! Reply STOP 2 Unsub. WTF! My number is on the do not call registry!!