well as an older gal,i can say that my rates have always been same from the beginning...i even offer loyalty deals...
i make a very comfortable living at my rates...there are a few cities that suck financially but .in most tour cities i get booked way before i get there and I make a good profit AND have fun!! (and still only see 2 to 3 gents per day..usually 2)
and.most guys say i should charge more for the quality experience i offer!! ...in fact,most gals around my age charge way higher than me!!
some guys ive been seeing over 10 years and one from here that ive seen for 15 years!