I just sent Obsidian a message via Kickstarter on what I'm trying to confirm. I'll post it here in case anyone has any insight or if anyone can link to an official answer on any of these (assuming there has been an answer on any of these):
#1 and #2...... who knows. You will need to wait for an Obsidian answer on that.
#3: All keys (as of the last official answer) are considered to be standard game keys. AKA: The Hero Edition. You download all your extras based on your pledge level from the Obsidian Portal itself as separate items. The reason for this is that there are things you can get that are not available in any of the three versions of the game as a backer so it is impossible to host those within the standard game versions. As a result since you had to go to the Obsidian portal regardless they felt it would be more effective to just make the Obsidian portal your one stop shop for everything save the game download itself.
#4: I can't think of any good reason why they wouldn't be. They know how many every backer needs already and they can track the pre orders. They are keys, not physical game discs. Generating the needed number should not be a concern.
Edited by Karkarov, 11 March 2015 - 09:49 PM.