So, PieFed's way of retrieving a post that you're viewing on a "wrong" instance is quite slow for the user. You press the icon with the magnifying glass, scroll to the bottom of the page, read texts on both of the buttons, choose the correct one (Retrieve post), then wait for the page to load – which is suprisingly slow, then paste the URL in the field and press enter, and then wait for the next page to load and still have to press a link.