I also had one in my room upon arrival (9/7 - 9/12). I didn't request it, nor was I charged.
I was on the 3rd floor, Samoa. During our stay we say many refrigerators in the hall outside the rooms. I can only assume that they were in the processed of being installed.
I've read other posts that not all rooms have them yet, but I've got to think they're getting close.
I've also read that if you request one, you will not be charged.