Oh I think part of what some of us do is illegal and directly relevant.
Namely offering "Duos" or renting out spare room for by the hour / day, to other escorts.
Both these things are (IMO, wrongly) illegal.
I know one Indy, raided by the police for ads, offering i/c Duos.
In central London very close to the Olympics.
So it seems a fair enough enquiry.