Mr. Haaretz opened up a can of worms here, one that deserves its own thread. It gets to the core of why we refer to this as a "hobby". Paying for sex is purely a quid-pro-quo transaction. IMHO, referring to basic mongering a "hobby" is a stretch because it involves almost no skill, except perhaps that required to get the $$. All that is really required is showing up at the AMP with the HF+tip. Those on these boards who have no skill at mongering are easy to identify: they are the ones continuously railing about how they got "ripped off" by this or that girl.
The more experience I got AMP mongering, the more it seems that the hobby is about using your personality to get the biggest bang for the buck. That is when you use your personality to get the best experience possible at the lowest cost. To me, getting an AMP girl to fall in lust with you and fuck you with gusto+extras (inside the spa) or for free (outside the spa) is a very valuable skill. It is also a skill that translates to success in other areas, especially those that involve persuasion. To me, this is the essence of the "hobby" and what can elevate it to an art form.
SA requires even more skill than either the AMP or the escort route. For the latter options, the girls will usually take all comers, except in extreme cases, as long as you have the $$. SA requires a dance and a negotiation to get what you want. As noted many times, the selection process is far more intricate & exhausting; in many ways, its akin to dating. But, like AMPs, you can hone your skills to get more benefits for less $$. That is the best part of the game.
And its possible to make it happen for even the most jaded, money grubbing woman. An accomplished safe cracker once likened women to safes: there are easy cracks and there are hard cracks. But there are no impossible cracks.