That certainly is true in theory.
[QUOTE=Michael1967;4976098]A SB would be not be looking for two guys to do her at the same time for a bunch of money. That's an escort. A SB would be looking at a longer-term relationship where she's taken care of for 6 months to a year or longer.[/QUOTE]In practice I've rarely committed to any long-term kind of deal with any of these girls. Usually it is meeting by meeting. My own observation is that very few girls on those sites are actually adult enough to be able to handle a long-term commitment.
For a few months in the early 2010's I had a $5 k / month arrangement with a beautiful girl who was also a major freak. The arrangement was that she'd spend at least two weeks a month with me and that there weren't many boundaries (we discussed them beforehand, basically no permanent damage or injury was permitted, she got an IUD at my expense so no bastards, &c) during our time together. She agreed and actually was okay with it, but in the end I became bored with her (even though the fucking was great) and she also had a serious maturity problem which made any public situation kind of fraught. But all in all it was money I was okay spending.