Hi, I'm a Hamburg native. That site looks like a scam to me tbh. Try this, it's the go-to-place to find companions
External Link/Members Only, reviews here
External Link/Members Only(difficult to navigate if you don't have any German)
I can highly recommend Chiara
External Link/Members Only[volltext]=chiara
(if link won't work, type in Chiara in search)
She's brasilian and speaks decent English and amazingly looks like the pictures (a bit darker). 80 Euros/hour, 150/hour. Bargain, if you ask me.
Cheers!