And all of that together means that many times a guest MIGHT be better off NOT "renewing" an AP,
IF that AP will not actually be needed or used
30-50 days following the old AP's anniversary date.
If its not, many (most) times a guest would be better off just waiting until their next WDW trip, and THEN buying a new AP at full price...
thereby getting a FULL YEAR of potential use out of that new AP after its first use at a park.
As always, check your plans and your math.