UC plants happen very often. They will only care if they think something else is amiss. Like the women seem unsure and seem scared or something. Or the obviousness of drugs within. Sex work in general isn't what they shut things down for, unless the community really pulls to get rid of them, which does happen in dominantly residential areas.
Just think of it this way, if the government actually really gives a damn, they already know of every single one of these places that exist, except maybe the uber private ones.. as every AMP publicly advertises their services on at LEAST a dozen or more websites and other places. They can shut down every single one in an instant. But they don't. And they won't, because as far as crimes are concerned, an AMP isn't high on the radar list.