Pheace: Although personally I'd name the release of Elemental as a shining example, and the selling of Impulse to Gamestop of all places ...
You might find
this an interesting read then (go to the
Stardock Sucks part).
Darvin: Indeed; they may have had a solid business reason for going Steam exclusive, but they'd been branding themselves as a DRM-free haven for years leading up to that heel-turn.
Not really. They were against inconvenient DRM (like Starforce, Tages, and Securom), not DRM in general. Just take a look at GalCiv 2.
If you bought the retail edition, then you could install the game wherever you wanted, because there was no copy-protection on the CD and no DRM. However, if you wanted access to the patches, then you needed to register the game, binding it to an account (which also gave you access to the digital version).
If you bought the digital version, then it was already bound to an account, and each installation required a one-time online-activation.
Darvin: They're completely separate entities; Ironclad was the developer, Stardock was the publisher.
Stardock helped Ironclad quite a lot during the development of Sins, even lending Ironclad some of their programmers at times.