Who cares what it is? What it is, is the entire point! And that’s Kickstarter, not a warehouse. You pledge a sum because you want to see this game made, you don’t pay to get copies of the game in bulk.
Think it over: every digital copy you receive you’ll pass on to friends and relatives because you have no use for five PE serial numbers. That’s fine, there’s nothing wrong with that but of course it’s a ‘loss’: those are five or ten copies that go to (otherwise) prospective buyers. To give more free digital copies is economically unfavourable for Obsidian.
Digital, so no loss – really ...
What you want to call it is totally irrelevant here.
What is obsidians goal? Raise money. Would it be beneficial to both obsidian and the fansites if they'd provide them with more than enough digital copies? Yes.
Undecided potential backers are more likely to donate if they are encouraged through their community, that's all this really is about. If they could get a copy -and- get a high tier reward for their community, everybody wins.