A story on the Consumerist complains of problems running a copy of Warlords Battlecry III bought on Impulse (thanks nin). The poster attributes the problems with random items and wonky NPCs to DRM, saying Stardock is aware of the problem, but refuses to address it in spite of a patch that's available and their very public stance against intrusive DRM. We contacted Stardock and they say that Enlight has repeatedly assured them the game has no DRM, and that there's nothing preventing users from applying this third-party patch:

This is nonsense. I have gone to Enlight 3 times about this and Trevor Chan himself has assured me each time (to the point of annoyance) that we have the latest version of Warlords Battlecry 3 and that is has NO DRM.

What people complain about is that there are fan patches that fix some of the bugs in the last official version (which is what we sell). We are not authorized to distribute a fan-patched version of Warlords Battlecry 3, but there’s nothing that stops customers from applying those updates themselves.

Update: We are also informed by Stardock that the author of that complaint received a 100% refund days ago, and that "Impulse is the only digital retailer that provides refunds for people who do have technical issues for whatever reason."