Several people have mentioned the access time being an issue for surfers. That was really put in so the product would support a short-term subscription, say a 30 minute access to a whole site. (see demo 2 at
www.surfingsuggestions.com)
For the pure per-click model, we could hide the access time. He would still have limited duration access, but it would always be set to 24 hours, and wouldn't be in his face. That way he's only got the price to think about.