Following the link brought me to a site that claims: "World of WarCraft leveling is both an art and a science. It is an art because getting to the next level requires much creativity." To help you unleash your chained-up creativity there's a link to a leveling guide. My first reaction to that line was side-splitting laughter. Leveling in WoW requires creativity like playing Whack A Mole requires a Masters in Fine Arts.
Now, I love me some leveling guides. I inevitably hit those weird spots where a zone is too low-leveled and the one next to it is too high-leveled. Having a site that listed zones appropriate to my level range was a boon leveling up. There's one, small difference between the links in this paragraph and the one above it: mine are free. His is not.
I've got two, hopefully easy questions: what sort of a snake oil salesman sells these guides, and who in their right mind would buy something that a quick Google on "world of warcraft leveling guide" should provide for free? What do you think? Is there any way in Azeroth you'd ever buy these things? And if so, I've got a lovely bridge for sale over the Hudson River for sale.