nV built their resources, AMD needs to do the same, take back marketshare in the Windows environment, as Mac stated ROI has to be high on current efforts before they start focusing on their stance on weaker markets. That is just smart business.
Throwing money into something that will have low ROI in the short term expecting it to grow based on a number of other companies and a total different set of market variables is only not smart its a recipe for disaster and a gamble.
AMD's weakness is their hot, underperforming hardware, and your overestimating the resources needed to develop a decent Linux driver.
It's this ignorance on behalf of AMD that is going to be their undoing. AMD has always been perceived as the underdog in comparison to Nvidia, Linux users like the underdog and I'm going to keep hammering home that a 1-2% marketshare globally is no small market. For AMD to ignore this userbase and assist in helping that market grow is just ludicrous.