I have used the security code for which cashback offer was going on, it was successfully applied but didnt get the cash back. Then I raised a customer support ticket and got reply that I need to make another transaction. I think this site is chating customer by attaracting such offers. I even used another offer which said I will get 32 rs cash back if I use ICICI card when I applied using ICICI card it showed me the wrong warning that I had used the card earlier and didnt apply the cash back.