There is no DVC or TIW food or merchandise discount. I visited again tonight, and Cast Member said nothing is in effect, but may have a discount "next year."
The standard lounge chairs at the pools and beach are free. As are the permanent umbrellas.
The fancier wood lounge chairs on the beach, have a fold up/down canopy, and they will place a cushion on it for you. I've seen people using them without paying when the beach is not busy. I think it would be uncomfortable laying on the wood planks without the cushion.
There are permanent umbrellas in some spots, but the paid one's are placed where you want to set up on the beach, by the beach attendants.
This is the first time I heard there was a DVC discount for the reef experience. As of 9/17, there wasn't a discount.
Confirmed that the refillable mugs are $18.99 now. They knocked $14.00 off!