A full up site for a game takes an increadible amount of effort and community support to put together. On our end, it requires a site built, which pulls developers away from other site projects, and we have to hire content managers to input the bulk of the data. It unfortunatly doesn't make sense for us to do so unless there is a significant level of interest from the community to make it profitable. Due to DDO's teething issues it never recieved that level of support. If we did launch a site for it at this point, it would basically end up like SWG: never able to fully catch up because of lack of community interest and lack of content manager resources to allocate to it.
When we are considering a site expansion, what usually happens first is we put a forum out there, and watch what happens. if it gets a huge amount of traffic, thats a good indication the game will ahve enough support to be worth looking at a game. We also look at how willing the company making the game is to give us beta access so we can start collecting data early enough to have at least a basic site, what reviews say, what beta testers who aren't supposed to be talking about the game yet say, etc. If the game company is willing to let us use an automated data collection thingie of some sort, there is a much greater chance a site will exist, simply because at that point we can do so without a huge staff expendature.
On the other hand, if a game company is activly hostile to us (what happened with vanguard) we won't consider a launch.
DDO was basically a botched release. They couldn't wait because the money was gone, but they should have. If they ahd waited a year, got the bugs out, got the engine nailed down, they would have been a serious WoW contender. as is, they just don't have the market share to justify a site at this time. Maybe someday if that changes we might see a site built. But at this point I would doubt that possibility.