Why is the game not popular in the Americas?

I am in Australia and fancy a morning gaming session, which is prime time right now in the US, but the game is at its lowest population in its cycle right now. There isn't even enough drivers to fill a single split in the weekly, there's maybe 5 or 6 splits in the bronze dailies at best at this time. The europeans have gone to bed, the Americans are ignoring this game. Why? Do we know if Americans in general don't sim race? Or is LMU just unpopular there itself and the Americans have another favoured sim?