EDIT: WEIRD.
But that extra content as it is now could just be withheld resources. There's no way of telling and thus, there is no way of knowing if the customer is getting screwed. Look at Capcom and their DLC-on-disc debacle.
Now I hope that the majority of developers aren't actively trying to screw their fans, but I wouldn't put it past them or especially their publishers.
There is a lack of trust.
So why not just let your fans dictate the worth of your DLC? That way we know for a fact that it was made close to or after the game's release. And we also know that we'll become more loyal just for the fact that you gave us some power as fans.
Yes, there will be people who take advantage of said company, but you know what? If you're game was good enough to be taken advantage of, then you are in a position of luxury.