Along these lines would be publishing your sacred hacks as early as possible so you can always point to the earlier timestamp: See!?! I did that! Then the copying is ordinary plagiarism. IMO, if your code is reasonably good and readable, it helps you get interviews down the road — some employers really do review your stuff before they bring you in.
But, concerning the grandparent post, I think a better model for making cash on plugins like this would be feature requests. I believe you can pay for votes at vim.org (for example).