It's a small world indeed. I remember some Eastern Euro spots from the 2008-2016 time frame that I use to hit up in Bk and Manhattan, and the ladies rotated similar to how the AMP scene works. All the girls were indi though just bouncing around finding places they liked to work at.
I only recently visited Europa but can attest that it's two completely different experiences. AR wasn't a bad experience until the last few years, the big upsells on extras and lack of basic service wasn't the norm until just before COVID hit, from what I rememeber. More so it's obviously run by a completely different group just given how the text/call communications experience goes.
I can't speak to ORMCH, but I remember people saying those girls worked elsewhere too. XOC has been decent for me I just haven't used them much since the base rate increases and a la cart extras started to get a bit out of control.