WordPress is GPL - the GPL, like all "Open Source" (using OSI's definition) licenses enables commercial use, and that is a subset of one of the FSF's core principles (The freedom to run the program as you wish, for any purpose).
By WPE - I don't think anyone has even claimed that informally - since they don't distribute software and WordPress is GPL not AGPL it would be hard to. Moreover they (according to themselves) use an unmodified version of WordPress which would make it next to impossible. Of course according to Matt they use “something that they’ve chopped up, hacked, butchered to look like WordPress” but “is not WordPress.” And is a “cheap knock off” or a “bastardized simulacra of WordPress’s GPL code.” [1] but there's still no claim that they distribute that simulacra.
By Matt - no one has claimed it formally but I think there's at least a plausible claim that he has violated part 6 with his attempts at extortion, which requires "You may not impose any further restrictions on the recipients' exercise of the rights granted herein". Especially clearly as it pertains to any existing nominative use's of the WordPress trademarks within the unmodified WordPress code (which trademark law in no way prohibits WPE from using, and Matt demanded were changed).
It was pretty different in a way that brought millions of people into WordPress, but it has evolved in a way that makes a lot of sense to people, clarifying what WordPress is, what the host is, and what the application layers on top of it are. And the new AI / Telex / Studio stuff is super cool.
Please tell me where you can run arbitrary PHP code in the cloud for free, I'm curious to see how they manage that and what limits they put before they start charging.
We've invested a ton in products like WordPress Studio, which let you run unlimited local copies of WordPress with however many plugins, themes, etc you want.