That is because as I understand it, reviews of "establishments" are not allowed - only of specific SP's. As these change regularly, i don't see much point . My comments have also all been within a year of the first one, so again I don't want to fall foul of site rules.
From the rules (bottom of the page):-
"Only sex workers can be the subject of a review, not a whole agency / establishment / brothel.
The exception is massage establishments where providers do not have names."
It is always good practice to quote a name though when possible.
Again, it doesn't matter that some shops operate a rota system. Some do, some don't.
There are hundreds, thousands of Reviews on shops ..... indeed you posted one about Star.
A Review, which stands out and has a rating, is always preferable to comments on a thread ..... they have no rating and maybe overlooked.