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_...).
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[ 2.7 ms ] story [ 29.3 ms ] thread"Exclusively commercially supported because there's no demand for a competitor" ...?
Hmmm. GitHub is an enabler and supporter of OSS - but unless something major has changed and I missed it - their main product isn't OSS.
They probably shouldn't be on that list.