The racing is good in the AMA series, but then so is the racing in WERA and any number of club races around the country. What if anything make the DMG series special or worth traveling to see relative any of the others?
Since the factories are for the most part out of the picture they aren't promoting the series or their paid riders like in years past. So now there are no heros, no promotion, no TV coverage and no audience. Sorta like WERA and the others.
If DMG can't or won't pony up for serious nationwide promotion the situation won't change unless the factories have some incentive to get involved.