They list what they won't do in extreme detail, they also use the older girls age as the age to put on the profile (ones 25, the other 23, they put 25 in the profile).
So it seems they at the very least seem to be taking this seriously and not a couple of flakes.
On the other hand, seeing two mid 20-year-old slim girls for an hour for £100 is one of those prices you think to yourself....PG seller.