> That is always touted by GPL advocates, but where is the proof? Where are all the companies enhancing non-GPL-licensed software and not giving anything back?
They're doing it to GPL software. Take a look at pretty much any embedded Linux project and you will find a GPL violation. For example, most ARM devices are unusable without binary drivers that rely on specific builds of specific Linux kernel versions (example - you can't get sound or accelerated video on the Raspberry Pi!). I've had one plug computer maker tell me they have a custom version of Linux and they won't provide the source. Whenever I come across anything like that I report it at http://gpl-violations.org/
They're doing it to GPL software. Take a look at pretty much any embedded Linux project and you will find a GPL violation. For example, most ARM devices are unusable without binary drivers that rely on specific builds of specific Linux kernel versions (example - you can't get sound or accelerated video on the Raspberry Pi!). I've had one plug computer maker tell me they have a custom version of Linux and they won't provide the source. Whenever I come across anything like that I report it at http://gpl-violations.org/