[Robert]

I'm sure the site has not been updated in a while but directly from the website:

As important as it is to know what a respectful gratuity is, we feel knowing what an excessive gratuity expectation from an Attendant is just as important. Excessive gratuities, pushing menu’s, [or a] rushed service is detrimental to the client’s experience and the business as a whole. For all involved, you the client, the company, and the Attendants, lose out on future opportunities because of a bad experience a client had with a greedy or impatient Attendant. In recent years, there has been an increase of Attendants taking advantage of the confidentiality of the massage rooms and the change of the solicitation laws to levy unrealistic expectations on our clients for the value of their additional services not mandated or regulated by the business.

Prospectively, taking into account the entire spectrum of the Adult Entertainment Industry and the average values of live entertainment services, we recommend the following guidance for gratuities, per attendant; gratuities for a body-rub massage have long been customary to be in the range of the service purchased. All additional services performed by attendants, we recommend a more then reasonable maximum gratuity of $150 for 30min and $200 for 60min services.

End quote from website:

Inflation: I know recently I have been paying up to $300 for the best premium coffee. If I enjoy the coffee then great I'm fine with that amount. If not, then I try a different attendant.