Just started a marketing platform for wordpress products, however I’m confused on the licensing options for themes and plugins? I am selling free, 2 site license for plugins and themes? Am I missing out on something? GNU GPL mentions that source code is free and we can limit the support and updates on single site. But, does GPL 3 come with a different version of it? I recently received feedback that selling 2 site license for themes make me GPL incompatible.
I’m confused here and would appreciate if someone could clear out the doubts for me.