OP, if you went to an AMP that you know provides extras, I'm sorry but you are barking up the wrong tree, and this complaint isn't warranted.
You come across as a cheap cheap guy. These women are human beings and they work very hard. Massaging, even for 30 mins is tiring. Even if you do not have them touch your junk, you should tip decently. And if you decide to be a cheap ass, you definitely shouldn't come on a review board and advertise that you are a cheap ass. They have a standard pricing tier and you should make yourself familiar.
If you want a legit massage, that is good, then book at a RMT. Although you should tip well there too, they do get paid more, as you pay more, and take a higher percentage. You'll get the massage you are after more likely than not, and you wont be obligated to tip, although you should just like with any other service.
If you go to an AMP type place, that is a completely tip driven industry, and insult the attendant with $5 even if you are unhappy with the service... you are in the wrong. Just donโt go back. Maybe leave a sub-par review. Those are acceptable ways to respond to this. You made the choice to go there. You took up her time. You know the situation and how they run their business. That is a gamble you took. Bitching and complaining and handing out less than a Starbucks Latte worth of loose change makes you look horrible. It is insulting dude.