The whole point of a cashback site is to get cashbacks. Quidco fails to pay cashbacks, and has no support to help people who aren't receiving their cashbacks. Instead, you just get vague emails saying that the retailer declined and there's really nothing they can do. I don't know if they just pocket the cash themselves. It's possible, since the entire process is completely opaque and there is no independent regulator to make sure they're not just running a scam. Whatever the case, that means Quidco fails at doing its job. So there's no point in bothering to go through their site.