It's not about "why they would say no," it's about them deciding on the terms of the deal, like how much of the pie Valve gets, and whatnot. Even when two businesses genuinely want to work together they still frequently make contracts between one another just to make sure both sides know exactly what they are getting out of the deal.
Really, with all of the programming and everything else that'd have to go into this, it's hard (but not impossible) to see it all being done in just one week. It's even hard to see it being done in two. Generally testing a product takes that sort of time, or more. I know this is as simple of a job as it gets, but until I see evidence otherwise I'm not convinced that Phil threw this all together all by himself in a week.
You do not have the right to never be offended.
