Originally Posted by pilotbob
I see what you are saying. Would be quite a coincidence if you just happen to want to add a new device to your account when the server was down.
It's not about coincidence. The issue comes from the fact that many companies which have used server-based DRM authentication systems have later found that their business needs required that they take those servers down permanently.
Should that happen with mobi, everyone is hooped for new devices.
With ereader DRM they aren't.