9 times out of 10 I find such criticism to be completely self-serving (eg to promote their new venture or agenda), a product of bitterness at the exit, a chance to take a swipe at the powers-that-be or a combination thereof.
Twitter's developer API followed a typical pattern: do anything you can to get traction for your platform. This includes being "open" to encourage developers to build stuff on your platform. Then, when you don't need them anymore, ditch them. From a purely business point of view, he wasn't wrong for doing it. It just surprises me that anyone is still shocked when this happens again (and again... and again...).
Those who are still bitter at getting locked out will champion this quote of course.
Take this quote:
> “IN THE BEGINNING, TWITTER WAS SO OPEN THAT MANY SAW THE POTENTIAL TO BECOME A DECENTRALIZED INTERNET STANDARD, SUCH AS THE SMTP (EMAIL SENDING) PROTOCOL. FOR A WHOLE HOST OF REASONS, ALL REASONABLE AT THE TIME, WE TOOK A DIFFERENT PATH AND WE INCREASINGLY CENTRALIZE TWITTER. BUT A LOT HAS CHANGED OVER THE YEARS”.
Put another way: they chose to be a business. No business chooses to create a federated system, at least no successful business (to date). There's simply no reason to. The problems with spam and abuse of the phone networks, email, texting, etc are largely a result of predictably bad actors in an "open" federated system.
The people who call for open standards either aren't a business or they're losing to the industry leader and they want "open standards" to not die.
[1]: https://www.vanityfair.com/news/2021/11/twitter-did-jack-dor...