People tend to be text-blind (particularly when skimming), so just writing
This is a linkpost for https://www.gwern.net/newsletter/2020/11
is not enough. A redesign using icons or color to help distinguish link from text posts might be useful. Perhaps a green circle on the header as well to be consistent with links, or a hooked arrow prepended to the text to point 'out'/indicate movement?
Yeah, I agree with this. We haven't been receiving many pure linkposts, so fixing this hasn't been top priority. But I do expect to improve linkposts like this (maybe also with some kind of smaller automated preview that helps you get at least a bit of traction on whatever is being linked to).