Yep, as everyone else has already pointed out, it lacks any sort of DRM beyond the simple license key check. We agree that DRM is a terrible thing for gamers; those who pirate the software shouldn't have a better experience than those who don't. DRM simply doesn't work, assumes that everyone's a thief, and hinders the game's playability now and perhaps even more severely in the future. We trust that people will do the right thing and also acknowledge that we couldn't stop people from pirating our software even if we tried.
AI War's source is likely to be available in the distant future when the game isn't supported anymore, but that's surely a long way off. We have a lot of interest in this game and play it, ourselves; that, alone, is already a lot of incentive to keep adding more to it. You can expect free DLC for a long time and expansions every 10 months or so for as long as there's interest.