Escorts aren't cheaper than OTC unless you're doing something really dumb, like doing 60-minute OTCs. If you're doing OTCs with a stripper who has a an escort-like pricing model, then you're getting the worst of all worlds: escort-like professionalism combined with stripper-like reliability. If you're doing that, better off with escorts, perhaps. But if you're doing "per date" style pricing with OTC, given that many OTCs go for hours and sometimes overnights, the pricing difference vanishes. Many escorts in this area charge $1500-$2000+ for an overnight; even with hotel room, dinner, drinks, etc., you won't spend that on an OTC. I have a lot more thoughts in my article here: tuscl.net
TL;DR on escorts: multi-hour OTCs are better value than multi-hours with escorts, with a hotter girl, who hasn't fucked 4 other guys that day... if you're willing to put up with the possibility of her flaking etc. If you just want a warm hole to bang for an hour, escorts are fine I guess
To me, FBSMs are a bit different, and I personally have always had room for both SCing and FBSM. FBSM really is a bunch cheaper, I don't really want more than an hour FBSM, FBSM when done well provides a different more sensual experience that puts it in a different category. So from time to time, I want to just set an appointment, get a super sexy massage and expert handy, all for much cheaper than an escort or OTC? I'm in!