I am guess they were thinking along the lines of consumer law, rather than their own as described policies. Paypal/ebay are in the business of enforcing their own policies whereas department of fair trading is responsible for consumer law. Extrapolate this to a new item bought that fails towards the end of its consumer law guarantee periods, odds are it would be even harder, if not impossible, to get a refund via ebay/paypal.

How to claim on guarantees for item purchased via Ebay has always been a tricky one, compared to just walking into a store. I think it is one ares ebay needs to clarify better to increase consumer confidence.