You joke, but maybe selling everything they make for a decent profit, even if it is only 10% of the total market is winning for them.10% market share is winning!
I genuinely don't think they pay attention to market share anywhere near as much as we seem to think. I guess since the steam survey is the closest thing to actual information we have, we focus on it. But they are probably looking at completely different charts that have things like manufacturing cost, and sales numbers and distribution percentage on them and will base thier actions on that.