I don't know your examples, but be aware: Sometimes, some other bad actor will steal (copy, borrow) pics of a PS and use those pics in their ads to lure in clients. It can be a bait and switch or a full blown "pay a deposit, then NCNS" scam.  
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I.e., if Caitlin Bell's photos show up in Gabriella Solis ads it COULD be CB escorting under the GS name but it could also be GS, no relation to CB at all, running stolen pics in her ads.