DC300 Yep. You could probably attribute the lack of viewer interest to a lot of things - maybe men watch more TV in general, I suspect they definitely watch more sports. Men at large probably don't like to watch women be better than them at something. The men who have watched the PGA for years don't necessarily have a hole in their lives that the LPGA fills.
The LPGA being dominated by Asian players probably has a lot to do with it in the USA as well.
Whatever the reason, the interest that drives ad sponsors just isn't there. Is a great product that no one wants to buy a great product?