It's a wiki (at least it used to be). A lot of people, including me, spent a lot of time and effort building up the content on the site. Not for nothing—I got an intercontinental flight, a stay in a nice hotel, and a conference ticket in a new city—but many of the people who made the developer.mozilla.org content what it is are never going to see any of that money. The MDN staff, though, some of whom are almost certainly overcompensated despite project mismanagement and dubious choices on par with the judgment of Mozilla leadership itself, definitely will see some non-zero amount appear in their bank account every pay period.

For outsiders to show up with such strong opinions like yours, it feels... weird, at the very least.