The pinned posts still obey some of the visibility rules of any other post. So, in this case, piefed.ca has Popular as the default sort on the instance. That means that the community that is home to those posts must have the Posts can be popular box checked in the admin settings for that community:

I can't confirm that this is the issue, but I was able to confirm with a dev instance that local-pinned posts do show up for anonymous users using the popular sort when that box is checked and don't when it is unchecked.





