Oh boy, let me break this down for you:
That server was on that blacklisted list as seen. This means that after 1.9.whatever people will be unable to connect to it. It is also one of the largest servers on minecraft I believe
Meepcraft is not on the blacklist, but may end up on the blacklist if we didn't do what was the right thing and change the perks. We do not have the players to try and hold out from upgrading.
Furthermore, the EULA is a legal document that encompasses all versions of minecraft. Doing what that dumb server owner is trying to do can get him and us into legal trouble still. By not upgrading the server, chances are that in the near future the server will end up dead in the water because players aren't gonna downgrade their clients to play one server. Even if they do, meepcraft does not have the player-count to try and attempt this manuever. Basically, the EULA is a legal document that I'm sure mojangs lawyers will be more than happy to have a hay-day with. I'm actually surprised they haven't started suing server owners for violating it. This blacklist is just one of the many ways that mojang has to try and enforce it.
"But epic how are we as a playerbase/server bound to the EULA"
By logging into the game or even having it on your computer, you are bound to the EULA.
"If you buy, download, use or play our Game, you are agreeing to stick to the rules of these end user license agreement ("EULA") terms. If you don't want to or can't agree to these rules, then you must not buy, download, use or play our Game."
Doing this blatant publicity stunt will end up with nothing in the future. How do I know its a publicity stunt? Who tf in their self-respecting mind complains about something to keemstar.