A lot of people here are missing one of the core tenants of the GPL, in that any linked application must also be GPL.
Wix developers created an MIT licensed wrapper to bypass this restriction. In the terms of the GPL that isn't allowed. This is why you see BSD or MIT code being ported to the Linux kernel but it doesn't go back the other way.
Calling it stolen code is a little strong, in reality they are in violation of the GPL. If the Wordpress plugin has been LGPL or MIT then it wouldn't be an issue.
Comments
A lot of people here are missing one of the core tenants of the GPL, in that any linked application must also be GPL.
Wix developers created an MIT licensed wrapper to bypass this restriction. In the terms of the GPL that isn't allowed. This is why you see BSD or MIT code being ported to the Linux kernel but it doesn't go back the other way.
Calling it stolen code is a little strong, in reality they are in violation of the GPL. If the Wordpress plugin has been LGPL or MIT then it wouldn't be an issue.