It's a pertinent question that I already have made to myself sometimes. And I did it once to try out, and a post that had 0$ on the first try, made 15$ on the second... although an edited a little bit the article but I think the right way to do a repost is to do an extend or revised post, where the author adds more content to the original one.
RE: Can you plagiarize yourself? Should we repost steemit articles after payout? Let's discuss.