I’m going to go with “nothing”. They blend their numbers but I’d be willing to bet the amount of money they make selling direct licenses is tiny. (Tiny at their scale, I’d take it any day.) The whole OEM business isn’t even huge to them. If they start losing the enterprise market, then I’m sure they would throw down, but you and everyone you know installing Linux would be fine. Have you noticed how easy it is to steal windows and how there seem to be very few repercussions? That says volumes about what they think the revenue potential of that market is…