I know Axe knows this, and I am pretty sure Mark does as well, but for those following along who would ask why invest that kind of effort when just purchasing is soooo much easier:
You get a woman who isn't seeing even just two or three guys a day. In fact she is probably seeing, at the level she is seeing you, only 1 or 2 guys a week.
She is pretending to herself, because she desperately wants to believe its so, that this financial arrangement doesn't make her a "hooker". Therefore she can't very well go treating you like a john because it totally screws with her ability to think of herself as simply a friend giving benefits to a helpful pal of hers. Not a customer at all, ya see.
That the above leads to more spontaneous sexual situations, that even have side spin benefits in the clubs and when she is through with you; which eventually happens because extension of "the game" that both of you are true friends means you both have to be ever more intimate on an emotional level and that is risky for both of you, so she passes you off or puts in a good word for you with friend(s) of hers [or it simply ends... though if you are both not on the same page it can be the stickiest part of this business].
Last, but certainly not least, that some times you actually do come away with a friend, though at that point you have probably ceased having sex. That friend though is someone you can now talk to about all of this crazy business and share a laugh with about it all. Surprisingly good stuff, I have to say.