Just to report back after visiting Singapore and all I can say is we're being ripped off over here.
I made two fs bookings, one was a double for 90 mins / 2 shots and it cost me $300, the other was 60 min / 2 shots for $200.
Both were quality bookings too, yes their photos are heavily edited but the girls are very pretty regardless.
I went with an agency as there are rumors the freelancers at orchard towers are a bit too relaxed about wearing protection and regular checkups.
They make you do a ton of verification before they allow you to book but it's worth it.
Also the service is top notch, the girls shower with you too, something that you don't see often here. And they're very eager to please.
A lot of them advertise on telegram, and bookings are made through WhatsApp.