Let me weigh in with a different example using a more 'normal' scenario.
Owner has a 200,000 point annual CWA allotment with a January 1 account. No VIP, no PIC, just 200,000 CWA points.
- On March 1 of 2020, the owner has 100,000 points left for 2020 and no plans for using them.
- On March 1 of 2020, the owner moves those 100,000 2020 points to 2021.
- On March 2 of 2020, the owner attempts to book a 300,000 point Spring Break March 2021 vacation. The system says not enough points.
- So, on March 2 of 2020, the owner scales back the vacation plan and books a 200,000 point Spring Break March 2021 vacation. All is good. The CWA ARP for 2021 has been used for the Spring Break March 2021 vacation and the account has 100,000 points remaining in it for non-ARP vacations in 2021 (and express vacations in 2020)..
- Now, March 2021 rolls around. The 100,000 points moved into 2021 from 2020 are still available for use in 2021. But, the owner says, 'no more plans for 2021' and tries to move them to 2022. I don't think they can be moved.
The 200,000 2021 points allotment were used for a 2021 ARP reservation. While I agree that points are points for reservation purposes, I have to believe that the system knows that this user has used the entire 2021 points allotment benefit. I do not believe the the 100,000 points remaining in the account March of 2021 can be moved forward.
Like many others here, I'm VIPP with PICS. I take advantage of my discounts and seldom book use the ARP benefit. I probably will never run into a PDF problem. Those with accounts who really have to manage point use, could, if my assumption on how PDF works is correct. All this discussion on the PDF is one reason why I liked the Credit Pool, it was easy to use and understand.