[casual_games] Digital wrappers and use limited keys

[Tim Turner]

We have a couple games about to come out of the oven but haven't gone
through the shipping process on our own yet.

What (free?) digital wrappers are you guys using?

I've seen games where the key can only be used to unlock X clients...  What
is on the server side of this?

A robust primer would be great- or just give me a thread to pull.

Thanks,
T