This one is easy.

It's men that pay 20% more than required and leave 20% earlier than expected.

A guy who doesn't wipe his dick on the drapes after he has cum.

I'm qualified, BTW.

you will get what she decides to toss your way
   and
       enjoy it

these are the guys that are not focused on  
squeezing every last one of their pennies
        out of a provider's ass.

when I look at the ad boards, web sites, etc... it rarely appears. Then again, when I look at BP, it seems to pop up frequently.  

Maybe you are asking the wrong audience here?

Literally, it mean an affluent, wealthy or rich man who is courteous, respectful and kind to those around him

someone over 400 lbs?

For ME, it's just one thing...

Being respectful.

Not sure what it means to other providers but for me it doesn't matter if he's in a business suit, baggy clothing, or sweats... whether it takes him a couple paychecks to save up for a session or has the donation for multiple sessions on a daily, as long as a gentleman is respectful and courteous that's an A in my book

For me would be one that doesn't have to mention that he is upscale, it will show in how he carries himself or herself. How they talk and if they treat me like a lady, no need to tell me show me .

Isn't anything different that a dude expecting a car hookup. So many girls use this word in their ads to attract guys with better qualities such as less likely to haggle or cause problems, generous in the pockets, and well dressed and good hygiene. This word is so overused in the wrong context that its a term I avoid like the plague. Go try it. Write an ad somewhere with that word in it and you will have raccoons responding to it.