who I also recognized from having TER foot prints back in August/Sept when I was very active on SA. The "Madam" herself who is really 57 listed herself at 52 on SA and lists herself as 45-47 on her TER and BP ads. I also recognized a couple of her former and current girls but TBT, I don't see their ads on BP these days without any new TER reviews either! Maybe they found someone! Shrugs!

On the second part of your OP, I think that the traffic on the opposite direction is more prevalent than SB to provider. Many hookers masquerade as SBs to either pad up their income with someone they may actually be attracted too, or just prefer the SB life with less potential legal ramifications.

but I do know a few SBs who have considered that crossover.  I've discussed it with a few SBs who I trusted and knew very well.  They were extremely interested and fascinated by the wealth of info available on TER and in particular about the safety aspect of screening which is totally absent in Sugar Dating.  It's been said here on this forum that if you talk to a SB about escorting and she then goes for it, gets busted, and the cops lean on her she's likely to get you in trouble for "promoting prostitution".  That seems at least theoretically possible.  And it's also been said that SA simply must maintain the fiction that they are anti prostitution. Therefore any SA girls playing in both worlds could lead SA admin to take legal action against TER that would be detrimental to our freedom of speech here.  I think these are the reasons it's considered bad form to talk to SBs about escorting, even though in my experience such talk has led to a deeper friendship with the SBs.

There is a very well known Chicago provider that just recently showed up on SA.  I Msg. back and forth with her but she just doesn't get it.  She is used to her escort rates of 350-400 per hour and thinks that everyone on the SA site is a cheap ass because the offers are not in escort rates.  I guess it is a learning curve but I don't think she is going to be on SA very long.

I have run across a couple of women on SA in the Los Angeles area who are also active on TER. I exchanged several emails with one and am confident it was the woman from TER. Ultimately, that situation did not develop into anything, mainly because I had other, more promising situations at the time. And then today, I saw a profile for a woman who looked vaguely familiar so I checked out her profile. The pictures were definitely of a woman I know from TER. I left a message and am waiting to hear back. I will be interested to see what her SA expectations are, assuming she responds.

I would guess (because I have no way of really knowing) that these women are trying a different marketing approach, with the hope of finding a different pool of potential clients, even though many men are both on SA and on TER. I suppose it's also possible that they have tired of the TER scene and would like to find something steady with a smaller number of men, or even just one man.

I've seen a few SA ads of girls that also have TER reviews, a few if them I actually met.
Once I see their ads on SA, I'll shoot them a text or note and kid them about it...we'll get a good laugh over it.  
Some drop their escort ads and their reviews and rely solely on SA...They don't want to scare away a potential "Whale Daddy".

Where I do most of the playing. They're using the same pics from TER and some are using the same name. I have been with a few of them via TER.  

And no, I don't approach them on SA. One I've seen since she's been on SA, her escort rates are reasonable so I continue to see her as an escort.