I'm with genius on this one. He was looking for a specific service, she seemed like she was OK with it at first, then decided she couldn't accommodate him. A refund was requested and given. What's the big deal? Even if he did not get a refund, that 30 would have gone to the house, not the girl. Either way, she wasn't getting anything.
You can't say that genius is obligated to tip her just as you can't say a girl is obligated to do HE just because we paid for a massage. I've been in situations like that in legit places and yes, I've felt short changed and misled, but when you pay for a massage and get a massage, you can't exactly ask for your money back. This is the risk we take when we try a new place.
In the same manner, AMP workers take a risk every time they are with a new customer. Most of these girls know the score and will do as much as they are comfortable with in order to make as much as they can. If they're not comfortable with something, they have a right to refuse services. Genius is smart enough to feel out the situation before the massage, so in cases where either he or the girl decide not to proceed, he has the right to request a refund. If I had felt out the situation better during some of my experiences I would have saved a good deal of money on massages that did not offer the extras I was looking for.
In any case, plenty of people overpay at AMPs. In the grand scheme of things, I'm sure she came out ahead at the end of the day.