Read about these dates the other day as well. We have booked a free dining bounce back for August for probably the last 5-6 years worth of trips. Not that I didn't see it coming though. It seems each year they push the dates back further and further into August. We arrive for a 13 day stay on the 23rd of this month. It will be the first year we won't be booking a bounce back for the following year in a LONG time.
I know there are other discounts offered, but nothing comes close to the free dining savings for us. Dining is like 50% of our trip enjoyment, and getting that free is a huge plus. Our trip this year is $3800 for 12 nights, park tickets and food. Having to pay for dining, even with a 20 or 30% room discount, pushes that cost a LOT higher than I'm willing to go.