not sure if anyone knows about this already, but if you add "C" to any Bluesky link with images (example bsky.app becomes cbsky.app) and post said link on applications like Discord, any external image you click on directs you to the source with significantly less compression artifacts than what is normally displayed on the site itself.
note that this method is only effective for artifacting, not for larger images that have been reduced to 2000px in height.
thought that might be useful for peeps