Currently--and I don't know for how long--the following two promos are in effect: 1) New players earn 1% free play, up to a limit of $100. It's awarded in $10 increments, for every 250 points earned ($4 coin-in per point on VP). 2) Gas card promo, earn a $50 gas card for every $10,000 coin-in.
This is cumulatively $150 in gas and free play for $10,000 coin-in, or 1.5%. The best game that awards points is 8/5 Bonus, returning 99.17%. So if you visit and play the whole $10,000 in one day, your expected value is ($150-$83), or +$67.
Not worth dropping everything and rushing over there tomorrow, but as Anthony points out, that kind of action will get you on their offer radar. Might be good for a free room down the road.
It's better than a kick in the oompa loompas. I know. I've been kicked in the oompa loompas before, and this is better.