what would a provider have to do to deserve a tip??

Whatever you do, do NOT try to offer a tip in exchange for an off-menu item! That's rude and you'll get kicked to the curb.  

Basically, there's no established protocol on tipping, but the ladies LOVE generous! For me, particularly for the first meet, I always tip as a goodwill gesture. I did my time in customer service in my youth, and the best lesson was that you never forget a good tipper. If you go back, you can bet she'll be more likely to go out of her way for you, and if you don't then you can take pride in being a good samaritan.  

And yes, IMO it is tacky when the ladies ask for a tip. If they want more money, they should raise their rates and provide a service commensurate with that rate.

I would say, if you went above and beyond to make you happy, she definitely has a well deserved tip..!

END OF MESSAGE

If you got a performance and satisfaction that was above your expectations, then offering a tip is a nice way to thank her for her efforts and can help to provide an incentive for continued service at that level.

A tip should not be confused with a gift.  Gifts are outright shows of affection which should come straight from the heart with no business intentions.

Some guys always tip. Some guys never tip. Some only tip agency girls and not indies, assuming that a big chunk of the agency girl's regular donation goes to the agency. Most of the ladies say tipping is always appreciated but never expected.
It is often said by the guys and gals that the best tip is a repeat visit, and their are tons of threads on the board on tipping if you search.

Now since your question is, "what would a provider have to do to deserve a tip?" it sounds like you are just asking for opinions, so I will give you mine. For me to tip a provider, she has to do something that is above and beyond my expectations. There could be a variety of ways to do that. Maybe she gave me extra time well beyond my appointment. Maybe she performed some service for me that she doesn't do for others according to her profile. (i.e. maybe, I got DFK or BBBJ, or CIM, and her profile and prior reviews say she doesn't do that service.) Maybe I saw her at a discounted rate, but I just felt the service was too good for the discounted rate so I pay her full rate. I would consider that a tip in this case. I don't tip often, but I do repeat, and when I do tip, I am not thinking ahead of time, "If she does x, I'll tip her." It's a decision made In the moment, during the session, or at the end, where I just feel, "Wow! I'm going to leave her something extra.

Well that's really nice that you tip at least there are some nice guys out there  
Xoxo kayden

I do not believe in tipping someone who is making $350.00-400.00 (or more) an hour. I sometimes bring a gift, but I feel tipping should be reserved for those people who are underpaid, because tips are expected.

Completely different, but I can't bring myself to tip someone who is selling me a $5.00 cup of coffee, unless it's a little loose change.