It's just a question. I think people repost to bring relevant content to their communities. Helpful if the content is coming from outside lemmy. What I don't understand here is that you're reposting something that's been on the top lists from All for a few days, coming from multiple communities. Lemmy doesn't have a lot of new content as it is.
And not all people sort by all, some use subscriptions or instance. Also, this is posted on a .ml comm and a .world comm, and if I only posted it in the more active .world comm, my comrades over at hexbear wouldn’t see it.
Edit: and no hard feelings, I hope, I just didn’t get why you were asking that question.