There may be three, possibly four people in the world who haven't seen Pam Anderson naked. Even if you have not wanted to see her naked, you just can't help it because she takes her clothes off so often and seems averse to wearing anything that takes longer than five seconds to remove.
Obviously Hugh Hefner is not a complete idiot and knows that 3 or 4 people buying a magazine is not worth paying Pam Anderson a great deal of cash to take off her clothes when she would probably do it for free. He needed inspiration, and after two hits of Viagra and an herbal enema from Holly he came up with an idea he thought was brilliant.
Hef decides that all guys like seeing two women together, or in his case three, and decides to pair up Pamela Anderson with the stalker from hell Denise Richards because nothing says turning a guy on like two 40 year old women pretending to be hot for each other in photoshopped pictures.
Allegedly Playboy is offering the pair $1M to do the issue which would be the January 2008 issue. Does this mean each one will get $500K or each will get $1M, because although Pam would probably do it for free, Denise has a reputation as a big earner and I don't think $500K is going to meet her price. Now you may be able to offer to pay her so much money per hour and that might work, but I don't think a flat fee of $500K is going to do it.