Still works. Booked 2 trips (same dates for 2 people) from LAX - LAS. Staying at Wynn with $100 resort credit, airport transit for $0 each. Package total was just shy of $300 and the credit took.

If you go into payment history after confirmation, you'll see the air portion and then another credit from Expedia for the same amount. May take a few days to hit the CC account.

Have air confirmation, seats and ticket numbers.