I'd suggest booking through the promo gateway to be safe. I don't know if it's relevant, but in a prior promo, after registering, I compared the promo rate and my Net VIP rate. Since my Net VIP rate came in significantly lower, I used the latter. I didn't receive the bonus. This time, I did the same comparison, and the "Members Only Madness" rate came in at $3 more, so I booked it ($47 vs. $44).