Pushing a girl for mileage update

i've seen this girl 4 times now and the dances are getting progressively better albeit if not for this chick possibly being the hottest chick i've ever seen i'd have already switched to another girl. first time titties didn't come out (this is a bikini bar) in the ld room but i could touch. i bought 2 danced. 2nd time i bought three dances and titties came out a little bit; i tipped $20 and she said thank you with some enthusiasm. the third time i bought her a drink. she did not sit with me while i waited for the bartender, ordered a shot came up for about 1 minute, did the shot and indicated when i was ready we would go for a dance and walked away. i decided i still wanted a dance because i was there specifically to see what i could get from her. the dances were better. titties came out quite a bit. but i was still pissed over the the incredibly low roi and borderline insult of the shot incident that i did not tip. i bought three dances and gave her the $60. shw said, "no tip today". i gave her $5 and said nothing. the fourth visit is my reason for this post. i go in she comes right up to me and gives me a nice greeting before going to another customer. i'm there for her only so i sit on a couch outside the ld room an wait for her while watching the football game. she comes out and is clearly looking for me but doesn't see me and walks right past. when she does see me she comes right up. she says "are you ready". i say "sit with me for 1 minute and then we'll go". she says "ok. i'm going to around the bar to collect tips. let me know when you're ready. i say "okay we'll go now." we go to the ld room. she says, "how many dances are you going to buy today? 4? " i say, we'll see. and she said, yes! i need it!". i say nothing and the dances are still not everything i want. but they are very close. i promised myself before going in that i was not going to spend more than $70 on this girl on that visit so i kept it at three and gave her $70. she asked, "are you leaving" and looked slightly concerned. i'm pretty sure next visit if i'm willing to pony up the money i can have whatever i want.