Winter Bash 2020 has ended, but I discovered an old Stack Overflow tab from a few days earlier which still had the snowflake hats icon on top. To my surprise, when I clicked it, I still got my list of hats:
I verified that the page was not stale, as I checked my reputation tab from the same page and got back today's data. Also, when I clicked the opt out of hats button, I got an error.
Can someone explain this observations? Is the endpoint for fetching hats metadata still up and running?