Cohost is shutting down. From the staff account:

…we’ve struggled to fill the revenue and morale gap. Colin and I have been doing this for five years, Aidan for three, Kara for nearly two. We’ve been at or over capacity on moderation, engineering, and general operations nearly this entire time. We have all been on-call 24/7/365 since we launched two and a half years ago. The day-to-day needs of just running the site meant developing alternative funding options wasn’t possible.

They are going read-only and then will make data exports available.