The impression that this thread has given me is that this place clearly has a few regulars that they appreciate. And so the management probably encourage the girls to make a particular effort to look after them.
It makes good business sense if it encourages frequent punters to revisit the establishment as often as possible. If they have worked out that punter is also a respected UKP member, they'll realise the good reviews are also good for business.
This doesn't mean those members are touts for that location. The reviews they have submitted are most likely honest accounts of the service they received. But it may mean that they are more likely to receive a good service from an inconsistent WG, compared to a first time visitor to that location.
Good for them, but it does mean that sometimes their reviews will have to be read with a little caution, and the understanding that YMMV. The same could possibly be said for any prolific punter that prefers a particular parlour or agency.