Super! My understand is that Krita's distribution through app stores has a similar flavor - it's pure GPL, no tricks, but people pay for the convenience and assurance of downloading the official version of the app.
My personal feeling is that as PC's become more locked down and less under user control, paying for the digitally signed version might increasingly become a viable business model. Trademarks and TOS enforcement might be a more effective moat against being undercut than copyrights and licenses.
