"If you first discover that coupons exist at the cashier, you must be an alien going to a store for the first time.'

I guess the risk of using an analogy is they eventually break down if you go too crazy on them. I made it a "real world" example to look at the online experience another way so that people could perhaps relate to the original's author pet peeve. I think if the author of this original article felt like he understood how to get a coupon for the site he was on and decided not to anyway he wouldn't have written the article. Subtle but important point here.