>Nominative use allows companies to refer to things by their name. It isn't obvious that "Wordpress Hosting" or "Wordpress plugin" is a violation or causes consumer confusion. Does Matt wish for all companies in the ecosystem to stop referring to their products as Wordpress Themes, Wordpress Plugins and Wordpress hosts?
I think Matt's position is that WP Engine is not Wordpress, so it's not appropriate to call their offerings Wordpress-anything.
That would be a truth in advertising issue if anything, not a trademark issue.