So, quick update.
Curiosity got the better of me and I sent a couple of SP's a message.
They were all very vague, all wanted a deposit, all advertised bareback, wanted to know how soon and for how long without giving me a postcode to work off and got very aggressive when I didn't make a booking (it was the bareback tbh). One threatened to report me to the Police. It must be a thing in Brazil.
Hopes that helps.
I'm off for a Thai massage now to de stress