Alpha testing is, by definition, testing on unreleased code. Even though they are offering the testing to some select group of people, it’s still considered un-released.
I go out of my way to explain how alphas are typically done as a games industry professional, and you're still out here spewing the same nonsense? get outta here. This is not a defensible action by a corporation. When a game reaches alpha, the whole of the game is unready but the part used in the public playtests are extensively reviewed by QA and gets as polished as possible. When a game is at alpha stage, it's by definition gone through multiple release candidates.