Hey, I remember using this site when it was full of people. First let me say that I know making changes is very hard I know nothing about webpages or servers or computers. But I personally think the site went downhill (in terms of traffic) when updates stopped coming.
Don't take anything the wrong way, but by updates I mean you didn't update the site enough. I remember you would post a thread up every once in a while like (blank changes coming) and they would never come, or they would come many months late, or the change did nothing to help (such as changing the format of the site). The biggest update you made since dtrades was to make it turn into the layout of this site, which isn't useful.
Again, I know your life is busy and there are time/money constraints, and it's hard work to make updates.
I think you should just make the site about d3, and when there is enough traffic on the site, expand it to starcraft II, and other popular games.