If you happen to belong to RCI exchange company:
a) they offer deals on short notice timeshare weeks (extra inventory that's about to go vacant), wherein you get an extra condo week for $99 to $399?? just cash....you keep your timeshare week ....this program is called "LAst Call".
b) RCI keeps a hidden/proprietary "quality rating" on each resort...known as Vacation Experience Profile (VEP). It's inpart based on customer surveys they resceive after travelers stay at each resort. It's also one component of RCI's secret/hidden trading power formula that determines what exhchanges are "comparable" to your week(s).
On TUG, VEP is also spoken of in the fact that RCI's 'matching' software will filter out resorts that are way beneath the one(s) you own, and not offer them to you...with the concept that you'd be unhappy to have 'traded down' to a lesser quality resort. So TUGGERS sometimes speak of a VEP-filter that affects what they see in RCI's online availablitliy.
Hat