I can't remember what it's called, but there's a bot on reddit that replies to comments with links to posts if they get linked someplace else. Having a bot like that would be great for here (and other communities)! In lieu of that, I think having people reply to comments saying "I posted this on /m/bestof" with a link to their post (but a bit lengthier, maybe with a set format?) would work as well
Maybe have the poster post the link url in this magazine and then have a bot follow that back to the original post with a reply, saying it had been posted to #bestof ? Also, we should probably encourage #’s more as that’s how kbin propagates things through magazines