We've had a number of instances lately of people taking themes and plugins that are NOT covered under the GPL, renaming them and sometimes adding a feature or two, and selling them here as original works. That needs to stop. Now.
Several of these came from Code Canyon, the licenses for which specifically prohibit this kind of re-selling.
We are not going to get into the legal debates about whether PHP code that relies on the core WP functionality is covered under the GPL automatically. We're not lawyers, and there are usually elements of those products which aren't covered even if that argument is valid.
Just don't do it.
If the plugins or themes ARE covered under the GPL, you're free to sell them, but not as WSOs. That's basically selling reworked PLR, which is specifically forbidden in the rules for that section.
I don't want to hear "My coder did it and I didn't know about it." That is quite often true, but we don't care. We know how the process usually works. You point a coder who works for $1.27 an hour to some existing product and say, "I want this same functionality."
What do you expect they're going to do?
If we need to start issuing automatic 30-day or longer bans to create enough disincentive to stop this stuff, that's what we'll do. You don't get to sell hundreds of copies of what amounts to a pirated product and then use "My coder did it" as a get out of jail free card.
To be clear:
NO theme or plugin based primarily on any existing product, even on one released under the GPL, can be sold as a WSO.
Copying a non-GPL'd theme or plugin will result in a ban. We will make those as long as is required to remove the financial incentive for carelessness in working with coders.
If the code is encrypted and it even looks vaguely like another plugin, we will act as if the code was copied.
I would appreciate copies of this post, or pointers to it, being circulated among the WSO sellers' groups on Skype and Facebook, and anywhere else they may congregate.