I'll briefly explain it in words:
The premium members, who's names are usually in bold, purchase tokens at a cost between $0.08-0.10 each, depending on the size of their package (200 tokens for 19.99, 900 for 74.99). The models receive a flat rate of $0.05/token. You're paid on the 16th and the 1st of each month, regardless of the length of the month. Members spend approx 60% of their cash on you, and approx 40% of it goes to maintaining the site - or so the site claims.
There's a thread here for charts:
viewtopic.php?f=15&t=6906
Hope this helps.