6 - With the Torchlight II Runic digital version the DRM will be the same as we had on Torchlight 1 - that is, a key with a generous number of activations by default (we had ten activations for Torchlight 1, the number for Torchlight II is not finalized yet).
7 - The plan is to have the Torchlight II Runic version be an "unlockable" demo like Torchlight 1. This means you can download, install and play without ever purchasing a key, the game just has some restrictions. We have not stated what these are yet, but for example you cannot play Internet Multiplayer (you need a Runic Account linked to a key for that) and there will be a content lock in place to prevent you from playing the entire game (like with the Steam Torchlight 1 demo ending on floor 5). If you like it, you can click "buy now" from the launcher and get a key, put it in and never get bothered again. No re-downloading. No re-installing. Just unlock and get back to the loot.
8 - With that DRM you will only need to activate ONCE on a computer, it will never dial home again (normal caveats about re-activating after reformatting your computer apply). There are no rootkits. There are no custom driver bullshit. There is nothing that accesses or interferes with ANYTHING ELSE on your computer. PERIOD.