"Getting in state" is a tool which you can use to let your natural self flow more freely from your masculine core. That is why some can consider the use of state a part of "natural game."
IMO what determines natural game or not is if whether something was spontaneous in the field or if it was planned and executed. By this definition, you could say that nothing you read about and consciously apply in field is "natural" until it becomes a spontaneous habit. This concept could apply to techniques that get you in state as well, like when someone spontaneously uses a technique to get in state as soon as he thinks of it while in the field. Then I would classify it as natural game.
Also, "getting in state" is a way to increase your spontaneity. In light of this fact, I'd say that it would be fair to classify such a technique as a part of natural game in most cases.
Ah, but what the hell do I know. I learned everything about seduction "unnaturally."
A Minor is right, though. You don't need state to game. It's useful, but sometimes your mind and body will just feel low. Don't let your body's natural cycles become an excuse to blame yourself for not being able to "get in state" as easily as you did the night before. Game on anyway and just flow with it.