The bit about how GPL "forced" a company to release its own source code is obviously false. If you release your own software under the GPL, you can't be forced to do anything, this only applies if you integrate third party GPL code. For your own code, you retain full copyright, and by definition the license you yourself applied cannot force you to do something you don't want.

This is a fundamental misunderstanding about how copyright works, the author could have closed the source completely without changing the license, because the license only applies to third parties trying to use that licensed code, not the authors.