Wikipedia has written
On December 11, 2010, Persson announced, via his personal blog, that Minecraft would be entering its beta testing phase on December 20, 2010, and that the price would increase to €14.95.He further stated that users who bought the game after this date would no longer be guaranteed to receive all future content free of charge as it "scared both the lawyers and the board."
Grob das Markierte übersetzt has written
Er gab auserdem an,das Benutzern,die das Spiel nach dem Datum gekauft haben,nicht mehr garantiert wird,dass sie alle zukünftigen Inhalte kostenlos bekommen.