I actually haven't received it yet, but Knott's started sending out emails yesterday regarding renewal offers for those who have their passes extended until May 5th.
The offer is to renew for the rest of 2022, so approximately 8 months or 2/3 of the year. It's $75 for Regular, $95 for Gold and $175 for Platinum. Dining plan is $95, parking is $65 ($10 savings) and drink plan is $34.99 (no discount). Seems most aren't too excited about it and were expecting a better offer. Some things aren't prorated correctly, especially the Platinum pass. As a reference, Q4 of last year, you could get a 2022 Platinum pass for $198 and get the rest of 2021 free (minus the last 2 weeks of December), including any add-ons like the dining and drink plans.
They're also giving a free bring-a-friend ticket and Scary Farm passes are still $99. Although I'll still likely renew, I'm just a bit disappointed the offer wasn't a bit better for the Platinum pass. At least have it prorated properly. Also, what happened to the loyalty/rewards program that was announced before the pandemic that would incentivize repeat visits?