Now, Morrus over on ENWorld says you don't have to pay to make the list, and in his case, he might be right - but I've had confirmation from others that paying is what got them on the list. ENworld may have made the list legitimately but much (most? all?) of that list is paid for.
Alright, email sent. I'll share the answers I get.
edit: lets see the Alexa rankings of some of these top sites.
Now, here's an unlisted number that hasn't paid:
I'm not saying every site on the list has paid, but this fairly random sampling shows some obvious ones that did.