I also got 35% off a Standard Club Level Room at the Boardwalk Inn for this August, although that was from a pin code which I got emailed last October.
Anyway I noticed you mentioned the Deluxe Room not being available and I'm wondering was it sold out for your specifc dates or sold out because it was not available with your discount?
In the past I have got the Deluxe Room on general public room only discounts in the past and it's always been available for other dates I was there on a specifc discount if I wanted to reserve it.