Since you're familiar w/ the Search, you might try finding threads addressed to "newbies"โthere are stickies too at the tops of the forums.
In most MPs that offer sensual rather than therapeutic massages, the door fee goes entirely to the house, and the girls only make money if you negociate with them for upgrades from basic massage (which is all the door fee alone will grudgingly get you). Typically upgrades go in $20 increments, Topless, Nude, Nude revers and Bodyslide and each upgrade makes a happier Attendant. Happy enough maybe to make your ending happy too.
Rumours abound of more complex, even sexual services offered for additional sums to specially trusted customers, but we speak not of such here, lest a rush of eager massageplanet.netarbarians trample the golden goose, or an enterprising cop take such posts to his sergeant and suggest a raid.
Only the wensiest part of this is strictly legal y'see.