Likely a scam of some sort.  Bait and switch, straight up robbery when you get to the location, blackmail or the PoPo.

They have a girl, she looks nothing like photos and gives a poor massage. There  are reviews on this group. Location is on Lake Street in Uptown.

...to conclusions if you don't have any data. The patterns of ads and rates don't constitute a stereotype, although they may be imitation.
If you search the name and primary images it will take you to several San Francisco ad sites.
And there you'll find other, different, contact details.
Do an archaic search of Tryst and you'll see this; "Viktoria_Black is a female Sensual massage provider from San Francisco, California, United States. ❤ "HotBaby – I am a highly skilled & thoroughly trained ..."