This place ripped me off big time, you get the “rate” walking in, then halfway thru service they up the price $60 more with no additional extras unless you pay more. Also, all 40+ at least. Don’t trust the ads.
The way they charge is not unheard of... the rate you pay walking in the door, tends to be the room fee, and the provider gets a cut of that, while anything extra is charged on the side.
IMO, it ensures the "mamasan" gets their cut first, before passing the earning to the provider, and whatever you 'tip' the provider is what you're getting in "service".
Sometimes, you go into shops where the mamasan doesn't interfere, and you pay the provider for the whole experience straight up, but then she leaves the room for a minute before the session to divy up the money, while you undress and lay on the table waiting...
I doubt you were ripped off, just expecting a FS session for the advertised 'room fee'.