I'm noting 2 texts because they both occured right after I visited and purchased an item from Walmart.com.
2/2 received text from 708 543 9636:
"Congratulations! As a thank you for visiting our website. You are eligible for a $50 Wal-Mart Gift Card. Call 877 825 3540. Reply STOP to end."
2/1 received text from 7862822690:
"We want to thank you Call us at 877 803 9548 For your 50 Dollar Gift Card Gift ID 905 Txt Stop to Unsub"