Those are fair enough questions, Democracy. You'll just have to look over the grammar nazis who occasionally frequent these forums.
I don't think that Demigod sold particularly well, especially given the connectivity issues at release, mixed reviews, and slow pace (and amount) of additional content released. I, too, am disappointed with the number of games posted at any given time, but hope that the new demigods will bring more people in/back. It is a really good game, and I hope that GPG/Stardock can come up with about 4 more demigod and four more maps before throwing in the towel. Frankly, I think that it is much better than anything else in this genre (like League of Legions and Heroes of Newerth), but just lacks enough content--particularly demigods--to give it longevity, which means continuing sales over time.
Demigod actually sold pretty well.
http://arstechnica.com/gaming/news/2009/04/demigod-sales-triumph-over-piracy.ars
The thing is, once you lose an audience you lose them for good. There is an initial bubble of players who play for the novelty, but very few stay for the long run. The new Demigods and mod support might bring back a few players and the deals might attract a few more, but that is it. Let's be honest, everyone said that everyone was waiting for the fixes to connectivity and look at where we are now.