The example linked has comments.

It also just seems very spam-like to me. Like 6 months ago, there were communities with lots of bot posts doing really low quality post mirroring for hacker news, some subs, etc. For some types of content, it does not work, as the content is a discussion. It's just not very productive to see a link post to a question and then have seperation in answers because something isn't properly federated.