When an escort's rates are at the top of what I am willing to pay (say $300,) I generally do not tip even if the performance was stellar because I already paid a fair price for what the service was worth. At $200 to $250, if I am happy with the encounter and had a good time, I tend to tip generously ($20 to $50.) If the experience was merely adequate, I just pay the asking price. I am more generous when an experience has exceeded my expectations, and those few times that I decide to spend $300, my expectations are usually pretty high. If $300 per hour is the rate, I will book a one hour session, however, if the rate is $500 for two hours, I might just spring for that depending on the situation.