While such a thing definitely appeals to me due to it's simplicity, my too-good-to-be-true detector immediately kicked in when I read that 1) it was a Visa card

While such a thing definitely appeals to me due to it's simplicity, my too-good-to-be-true detector immediately kicked in when I read that 1) it was a Visa card, 2) there were no age restrictions and 3) no address request. Those points were the most salient, but there was just an underlying current of suspiciousness. Normally, something that sounds this cool has a website full of caveats.