It looks like this has already been answered, but here’s my take on it:
You expect to see an ace about once every 13 cards. With four players at the table (plus the dealer) you will see about 2.7 * 5 = 13.5 cards per round (we’ll call it 13 for simplicity). That means you will expect to see an ace on every round and it will land on your spot about 1/5th of the time, so you will get an ace every 5 rounds. However, about 25% of the time it will be your hit card so it will not count. You will get that ace in your first 2 cards about once every 6.25 rounds.
If we assume 70 hands per hour then you will expect 70 / 6.25 = 11.2 aces per hour for a total of 2.24 $5 matchplay coupons. Since you will lose the coupon slightly more than half the time it’s value is just under $2.50. That gives the coupon a value of 2.24 * $2.5 = $5.60 per hour. Since your BS EV at the Vegas Club is roughly $5 * 60 * 0.003 = $0.90 (assuming the same 60 hands per hour flat betting $5) then your total EV becomes $5.60 - $0.90 = $4.70 per hour.
For comparison, playing heads-up at 150 hands per hour will earn $12.50 in promotional money while playing 2 hands heads-up will earn $25. It looks like Sonny will be making a side-trip on his way to the Halloween Blackjack Ball this year!
So, to answer your question, a BS player actually does have an advantage at this game during the promotion.
-Sonny-