I don't know why the other review is so terrible this site gave me credit for an entire month of free StraightTalk airtime so IDK? It did however take me a few tries but after like try 3 it worked like a treat! The website clearly states "we give them away when profits permit us to do so, sometimes the codes will not work as they do get used very quickly" -- Shouldn't that be enough?
Tip for consumers: You may have to try it a few times to get an UNUSED card because as the website states, they do go very quickly. It took me 3 tries to get one that worked and gave me a month of free StraightTalk credit.