As above, this is the "official" Twitter account.
This is the Twitter account of an Adam Glover, who appears to be having somewhat of an identity crisis. For more information, see The Story So Far.
This was the first set of clues in the game, which provided information on the ten dead drops as well as at least one clue used later in the game.
The next step in the game... At the time of this writing, it is still actively posting.