the only thing i see happening is a lot of £/$/€ 1 listings, with the actual price in the description...
haha yes. This is actually very easy system, nothing risky for them and not that costy for hosting... If price is like 20 cent and 0.5% of the totall price would be a lot better for example.
There was already a fee, I forgot the price, but I've had to pay fees in the past.