got this text too. have not tried calling them, but it's definitely a scam and invasion of privacy. dont know how they got my number. Maybe the car dealership i gave my number to? Van Chevy - they call me trying to get me to buya new car all the time. Or maybe "betus.com" i dont know. someone shady though, im sure.
I just got a text from that number and was most likely VERY STUPID. I followed the directions to text OUT to stop receiving texts. So now they know it's a valid number. Stupid, stupid, stupid.
So I did it... The Walmart offer. And they said they are sending the card. It didn't ask for anything forger then an address so all that can do is either send the card or junk mail so I don't really care. If I get the card I will get back on and let you all know!