Is Sony actually the smartest Android OEM for not focusing on US

The US market is plain and simple dominated by Apple and Samsung. We see companies like HTC going bankrupt trying to get a small chunk of that money. In general business you don't want to expand to another market until you know you can make a profit in that market. Why continually release phones and lose money when you can pull back into a smaller area and generate profit. You can instead put that money into R&D and create a truly innovative smartphone that you know people will talk about and when its ready than put all your money behind marketing. This is what I think Sony is doing by ignoring the US market "for now". I know HTC doesn't have the fall back of other divisions like Sony does but Sony's smartphone division is profitable by itself without the US market. Maybe HTC or even Microsoft should be following Sony's lead.