Not to mention his text messages. It's clear that if they were willing to pay, he was willing to not even mention them in his keynote. It looks quite clear that he wanted money and was willing to let everything slide if they got it.
(1) The WPE C&D is, in my opinion, sloppily written, full of equivocation/fallacious reasoning. The situation is not "clear". (2) We haven't heard Matt's explanation of the text messages. (3) The WordPress name was registered in 2006 by Matt's company Automattic. In 2010 it was generously (no good deed is unpunished) transferred to a 501(c)3 and Automattic was given a license to the mark (at least in WordPress.com). According to WPE themselves: "the payment ostensibly would be for a 'license' to use certain trademarks like WordPress, even though WP Engine needs no such license". That's a potentially disputed claim: they very well may need a license as they are (currently) possibly in violation of the (generous) trademark policy by advertising services they've titled "Essential WordPress", "Core WordPress", and "Enterprise WordPress". It's unwise to malign Matt publicly – a court will be sorting out the necessity of the license.
You don't end a trademark dispute with a blog post claiming a host utilizing a feature any sane host would utilize is a violation of some core tenant of WordPress.
You end it with lawyers talking to lawyers quietly.
