If you built your business next to mine, and I shared e.g. my water infrastructure with you for free or for a nominal fee, then one day your business got large enough to threaten my business, am I obligated to let you keep using my water, or should you have figured something else out long ago?
You did so, but turns out that other people are way better at utilizing that knowledge than you are. You throw a hissy fit on the internet. Everybody turns against you, even people who think that in essence you're right.
Seems totally fair, right? WordPress is 100% reliant on PHP and getting updates, new features, and security fixes for free, none of which the PHP project is obligated to provide?
Surely Automattic, a company valued at over 7 billion with annual revenues of over 700mil is happily paying Rasmus 50 odd million a year?
No? Why not? Are the rules different for WPEngine and Silver Lake compared to Automattic and Blackrock/Alta Park?
And, you know what? You can't run Wordpress without Linux, Windows, macOS, and maybe a few *BSD operating systems to run it on. I guess Matt's owes Linus and Bill and Tim, and a bunch of BSD project leads another $50mil.