In reply to Bradley Kirby (@Bradley_Kirby).

Well said. I sell plugins and some of mine are now being sold on other sites for a fraction of what I sell them for on my site. I assume they have a license with me and are receiving automatic updates and then redistributing it to whoever is buying on their site. I don't like it, but those are the rules I play by and I'm okay with that.

That said, I've never been comfortable doing that to someone else. While it may be entirely within my rights as a player in the game, I know what it takes to build a solid piece of WP software and don't want to hurt the original creator's ability to earn money. If they're willing to work with me to improve, enhance, etc. then I will always take that option before forking their code into my own project. It just seems like basic common courtesy to me.