I think this is a reasonable response if it is made in response to what the Tweet author linked.
Users are confused as to whether or not paying for a license for ACF Pro (a highly popular custom forms plugin for Wordpress, published by WP Engine) constitutes as being "economically related to WP Engine" and might impact their agreements with Wordpress.org
In response to this confusion, Matt Mullenweg told those users to consult an attorney. Unfortunately for most users, consulting an attorney before agreeing to login to a website is not a financially viable option.
They are worried it constitutes being "affiliated with WP Engine in any way, financially or otherwise", which is even more broad and vague.
Related discussion: https://news.ycombinator.com/item?id=41791369
Another Kingdom crumbles from within, and the Castles built there will suddenly disappear. Alas, just as archive.org gets hacked! Lucky for me, I bought an .io domain, so I'm good. Wait a sec...