If you link to a website through Quidco, you can get money back from your purchases. It is perfectly legit. I bought 2 2100 point cards from HMV yesterday using my girlfriend's student discount for £27. £13.50 for 2100 is the best I've seen for a while, so thought it was worth a couple, as the promotion is 2 for £30. Individually they are £19.99 each