A term you have already paid for is never repriced. Changes apply from the next renewal, and we send notice before charging at a new rate.
The extensions most affected this quarter are the cheap first year ones, where renewal prices continue to drift upward. If you hold several of those, it is a good moment to check whether the names are still earning their keep.
Prices on the site always reflect the current rate rather than the one in force when a page was written.