Heh... I bet the hype doesn't even phase her. At this point, she has more money than her future grandkids will be able to spend. She's doing it for the love of it, now, not the money.
I have no idea what her percentage of the sales would be. But even if she gets just $1.00 per book, that would've been over $10 million in one weekend.
Nice work if you can get it.