Just to add clarity, you get the number of points that you paid for that fixed week, whatever it was (you can see it as it shows the total # of points in your dashboard). That total remains constant, no matter how the
point chart changes in the future. That chart is also fixed based on the GW pricing established when the resort opened.
For example, I just added on Fixed Week #47 at CCV for 118 points, which most years is Thanksgiving. This was the cost of Week 47 when the resort opened + 10% (107 points + 11 points extra), but when CCV opened, it happened to be on the occasional year that Thanksgiving falls on Week 46! The
point charts have changed. In 2021, Week 47 will cost 123 points. I will not be charged any extra ever for my fixed week, even if the points chart changes. However, if I cancel my fixed week, I only get the 118 points to use, not whatever it costs to rent that week (123 in 2021). In my case, for Thanksgiving, it's a better bargain to keep the FW if I go to Disney over Thanksgiving that year.
The current incentives DID apply to my Fixed Week purchase, fyi. I actually bought two fixed weeks (47 and 48), for 336 points at $185/point (normal direct pricing is $220). I was sorely tempted to ALSO buy Fixed Week 52, as that's always New Years and sometimes Christmas, as it is only 168 points at CCV (and I did check, it is available), but my bank account said "NO!" and we decided we'd rather the two weeks back to back over Thanksgiving and beginning of Christmas.
Fixed Week 48 doesn't have the same savings -- it's also 118 points for the Studio, and the 2021 cost for that week is 110 points, so it's "costing" us 8 points more. But between the two weeks, the fixed week cost is only 3 points over the 2021 charts, and 3 weeks for guaranteeing a studio at CCV over Thanksgiving and first weekend in December without having to deal with Fall Frenzy booking stress? Yes, please. Also, I have confidence that the costs for those weeks will increase over time, and we will only ever pay 118 points each for them.