That's my experience too. I have a Qt application for Windows, Linux and MacOS. Windows makes 98% of the business, MacOs 2%, Linux 0%. The interesting part is that this doesn't reflect the download statistic of the demo version. There is roughly 10% for Linux and less than 2% for MacOs, but virtually nobody buys the Linux version. With that attitude, Linux will never become a mature platform. I'm about to cancel the Linux version. It's only the ease of cross-compiling a Qt project for Linux that makes me releasing to Linux binaries.