Look at this from her point of view.  Maybe you are so rich and so horny that dropping a few thousand bucks means nothing to you.  So why not ask for it?  OK, you are not that rich or horny, nor I hope would you pay her that much even if you were.  Offer to buy her a ticket to the game plus any other incidentals she may need plus a gift of $200.  She might just say yes.  I dated an AA duo in LA one time.  They asked for $1000 apiece.  I offered them a total of $500 for the date and they immediately said yes!  Offer what you'd be happy to pay and see what happens.  You might be pleasantly surprised.

One of my biggest disasters on SA was taking a brand new SB to a weed festival after just a meet and greet. We were supposed to stay for 2 days of the festival, but a couple of hours into it, she started complaining and wanted to go back to the hotel. There, she started to act all strange and didn't want to bang. I ended up taking her home with no sex and although I didn't give her any cash, it still ruined the festival for me and I was out the price of the festival tickets.  

Taking a new SB to a football game is a waste at best and could potentially ruin the game for you if she's BSC.

SFTD, I have a date for you at the game that's lots less money!!  Pay me $750 I'll go with you , I will not have any sex with you.  I'll leave at halftime find an SB or pro have my fun for $200 or $300 and go home.  Sound good??

Now she is OK with 300. And seems pretty nice via text. Chat today.
Meanwhile my Russian lady is in town tomorrow.  It turns out she is quite the greek. Yay