Just looking at my quidco account, realised since April, so in 6 months I've earned £244.88 (validated) in cashback, and Received £183 of that. I'm not a big spender and was quite suprised to see how much I'd received back in the space of 6 months... I wonder how many people are shopping fairly regularly on the internet, as I do - for gifts, etc. and don't realise they could be receiving this money back.
So.. how much have you made by cashback sites?