I think rewardcenter.net is the culprit(?)? I received a card from Rewards Center (where from??) with the 'reward code: 483688', and they only accept one call from the customer (for payment -then), and if one does not or is un-able to pay: they will n o t accept another phone from that same phone number. It seems that rewardcenter.net may-not be the only rewards Center, of 1-888-542-4143, online??