"The market sets the rate" is simply the core for this discussion. Supply and demand - if a Mistress is in greater demand and there appears to be a nearly unlimited supply of subs desiring to see Her, then the rate can be higher and is paid. Why do we pay more for a Lexus or a Rolex - better quality evokes higher prices. This works for quality or elite Mistresses as well. There also is an issue of familiarity. I continue to frequent the same hair stylist or auto mechanic or whatever since i have gone to that person for years and know their work. This also is true with a Mistress. With the free market, a Mistress will soon learn if She has priced Herself out of the market or not.