Piracy. It's an dark cloud that prompts many companies to employ draconian measures like DRM or electric shocks (coming soon to a game near you!). One notable exception is Michigan-headquartered
Stardock, which refuses to include copy protection in its games, a policy that interestingly hasn't kept its most recent release,
Sins of a Solar Empire, from putting up
respectable numbers both online and at retail.
_____________
Source: JoyStiq