I believe the bounceback offer has historically switched to a
free dining offer in August, that runs through October. It will be very interesting to see if they do indeed do this, as 2019 will have so many new attractions (Star Wars, Mickey's Runaway Railroad, Skyliner, etc) that they may no longer feel the need to do free dining. At least, that's the speculation among many bloggers.
I travel from late October-early November, so if I do a bounceback for 2019 I hope to have the option of both free dining and room only offers!