3 bedroom villas are rare, in demand and can hold up to 12 people. I'm not sure many of them go to anyone outside
DVC members.
Campsites, too many guests. Up to 10 can be registered at a campsite. The cabins are generally available, though.
Little Mermaid rooms are not numerous (most of AoA is suites), are popular and generally book up without WDW having to offer any type of discount on them whatsoever. Best way to get a discount on these rooms is via a third party reseller, but they never have very many of them available and they go fast.
There are only 20 Polynesian bungalows. Some of them will be booked by DVC members. There are very few left to work with. No need to discount them in this fashion.
Some of the more popular locations like BLT may have some discounted rooms available but on a very limited scale although it appears to be indicated that BLT is completely excluded from the 2016 offer. Some of the moderates are working out to have very limited availability and only in certain categories (the cheaper categories are often excluded entirely or very few rooms are made available, and only at certain times.) As of last year, very limited inventory has been noted in a lot of resorts. One has to book quickly to get the more popular choices for the promotion.
One blog is reporting very limited availability at Pop Century. With AS Movies and Little Mermaid AoA excluded, this leaves All Star Sports and Music as the most available value choices. For the moderates, POFQ is excluded, and the most availability appears to be at Coronado Springs.
This offer is further limited from 2015's in that all of October except the first is excluded as an eligible check-in date. Also the entire first 2 weeks of November.
anything designated as a "villa" was built as timeshare (DVC) accommodations. DVC releases some of its unused inventory to CRO to rent out to "cash" customers. Some DVC rooms feature things like full kitchens and in-room laundry. The smallest are closer to regular hotels rooms, but will include a kitchenette.
A reference for "Contemporary Resort" would not be the same as a reference for "Bay Lake Tower." BLT is a DVC resort and would be referred to separately.