I went on the same search. For those interest in formal definition: Commercial open source software projects are open source software projects that are owned by a single firm that derives a direct and significant revenue stream from the software (reference: https://link.springer.com/chapter/10.1007/978-3-642-03132-8_...).
"owned" is definitely not the right verb there.
"Exclusively commercially supported because there's no demand for a competitor" ...?
I hate it when sites put their About link below an infinite scroller.