I booked a bounceback in Feb. for BWI CL for Sept. It was 35% off. I know most dxl and DVC resorts were 35%. I'm pretty sure most mods were 30% off and values 25%, but I could be off on the mods and values since I didn't ask about them.
I was also there in April (April 20-26 at Boardwalk) and there was an offer in the welcome booklet. It used to be the offer was on a piece of paper/flyer somewhere in your room. The switched to putting it in the welcome booklets at the beginning of this year.
They offer usually changes in Aug/Sept. and that offer is good until around mid Nov. The offer in the fall has always been for free dining for the next fall. The offer from Nov-Aug. is for a room only discount. If you don't see an offer in your room, dial 8844 from your resort phone.
Bounceback rates are only for certain nights during the year and there are alot of blackout dates.
There was no bounceback offer in our welcome booklet or room at Port Orleans Riverside. I called the 8844 number and booked room-only; wasn't interested in dining plan. Ended up being 35% off for Polynesian.