Sadly, i went to the girl in the Original Poster's link and had an awful experience as well. The laundry list of complaints is too long to get into, but the biggest issue I had was that she is trans...to each their own, no judgement here, but that is just not my thing. Her ad did not indicate that.
Now, there is a trans girl with the same EXACT physical description, also advertising on STG, who just so happens to be in the same hotel, and I even messaged the number in the trans ad I just posted (to confirm it was her) and I received the same exact response as the transgirl from the original poster's link.
Way too much of a coincidence to think this is not the same trans girl.