imo, a few newbies/veterans don't wield the power to change the market price of a given service. kmps usually don't deviate from the standard very much if at all. they mostly maintain the pricing structure of 100/FS regardless of the state (at least ny, nj, pa, ct) and house fees vary.
also imo, there shouldn't be a 'max' tip. although i certainly have my limits on how much i will tip in certain situations, how can anyone tell someone else how much a good experience should be worth to him? who am i to judge the size of someone else's tip?
btw, when i go to a 160/FS amp (60-house, 100-girl), i don't see the 100 to the girl as a tip. that is my 'donation' for the FS i wanted. i know that in a legal sense these girls can not charge for some of the services they perform. but they do perform services that should be compensated for. the tip is separate. that is determined by how well they delivered the whole experience, relative to my past experiences. i look at it this way: it costs 160 to get a body rub w/FS. if i enjoyed the experience, i'll tip. not sure about the percentages but i'm certain this not a rare practice.
like it or not, this is how i roll.