Qt does something close to this; dual licensed LGPL and proprietary. Generally larger companies would rather pay the license than risk being noncompliant with s

Qt does something close to this; dual licensed LGPL and proprietary. Generally larger companies would rather pay the license than risk being noncompliant with some confusing piece of the LGPL. (Also certain stuff like the mobile framework is only proprietary.) Although their proprietary license cost is more than 'a small tribute'... Anyway, you could maybe have a tri-license: - GPL/LGPL - small-company proprietary license ($0) - large-company proprietary license ($1000) Although the proprietary licenses mean that despite providing a GPL license, you wouldn't be able to take advantage of outside GPL code. Plus I think you'd need to have any open-source contributors sign away the copyright of their code to you/your project's foundation.