[belorn]

While reading the emails, I do want to correct one thing.

The author to a copyrighted work are not obligated by the choice of license. GPL and other copyright licenses give people other than the copyright holder a licence to do things that they don't have under regular copyright law. The copyright holder however has full rights regardless of license.

The only exception is false advertisement laws, but those are quite narrow in definition, and might not matter much for non-paying customers. A paying customer would have a case however.