favicon_updated_at > unreachable_since
When looking at the instances
table I happened to see several records where favicon_updated_at > unreachable_since
, with the difference often being several months. This seems to mean that even if an instance is unreachable, favicons are still refreshed. This seems unnecessary. Many of these sites have changed to personal blogs, changed owner or are just empty and it is a waste of resources to keep trying to contact them.