I have become anecdotally aware of several (smaller) mastodon instances that are considering shutting down because they cannot afford their server bills.
If you are a #mastodonadmin of an instance that is 1000+ users and considering shutting down please reach out to me.
We may be willing to take over your instance and save your users if you are compliant with the Mastodon Server Covenenant (https://joinmastodon.org/covenant)