The way I understand it, the LE situation is somewhat opposite to what it is here. Here, MPs that supply "more extensive" services have proven to be pretty vulnerable to LE attack, while small scale incall operations are so diffuse that they are nigh well undetected.
In contrast, out there, the "accepted" thing is for MPs to offer up to and including FS, whereas the police are pretty keen on tracking down the escorts.
It's not evident why.