Most teams give the option of a full refund or credit for the following season.
I didn't renew my Ducks seats but did get playoff seats for this year. Even though I did not commit to next year, they still offered a two-part payment plan where I paid for Rounds 1-2 when I "renewed" and then Rounds 3-4 will be charged on Thursday, I believe.
That's a little over a month but it beats getting hit for ~$5K right away if you are trying to not pay any interest on them.
I read on the Sharks board that they froze playoff ticket pricing for Round 1, something the Kings have been doing since at least 2010 and the Ducks would have done if I renewed a full season. Apparently, this is the first time SJ has done this, or at least recently. Hard to believe that's true but, if so, that is another reason for the fan base to be unhappy.