

FYI: For those out of the loop like me, the headline is written somewhat ambiguously and actually means “free multiplayer features and Age features,” not that multiplayer isn’t included at launch.
That being said, according to the Civ website at launch “up to five players [will be] supported in the Antiquity & Exploration Ages, and up to eight players [will be] supported in the Modern Age.” One of the post-launch updates will expand that limit to 8 players throughout the game and another will add teams and hotseat to multiplayer.
Not sure why they’re not there at launch since they’ve been standard Civ features for years, but…
It’s a little bit confusing, but from what I’ve read, the collective bargaining rights that they previously enjoyed were granted from the beginning by the agency’s administrator, so it follows that they can be revoked by the agency’s administrator in turn.
Here’s a 2011 NPR article covering when they were initially granted those rights.
As always, this is the danger in allowing such rules to be set by the executive branch instead of codified into law — when the next guy is in office, they can always easily undo it.