What is the DRM scheme on King's Bounty?

[JudgeMan]

Just looked at the D2D faqs:

How many licenses or activations do I get?
All licensing has a limit to the number of simultaneous activation to protect the product. However our customer service will see to it that should you encounter a need for more licenses that you are accommodated.

So I guess you can't have millions of simultaneous installation but who really needs even 10 anyway. But I don't see anywhere a limit of total installation