The attorneys for WordPress co-founder Matt Mullenweg make that very clear in a legal response to WP Engine’s lawsuit. The response also blames WP Engine for relying on WordPress.org, “a website owned and run by Defendant Matt Mullenweg individually:”

WP Engine, a private equity-backed company, made the unilateral decision, at its own risk, to build a multi-billion dollar business around Mr. Mullenweg’s website. In doing so, WP Engine gambled for the sake of profit that Mr. Mullenweg would continue to maintain open access to his website for free. That was their choice.