There&#x27;s some confusion here about dual licensing projects. Maybe an internet lawyer can comment. The most successful project that I know of that uses dual license is qt which offers a GPL license for open source and a $500+ per month license without restrictions for commercial.  Some people say you can just link dynamically and include instructions for how to relink yourself, but if that&#x27;s true why would anyone provide qt any money, especially at $500per month or whatever rates they charge.