So, let's say that $100 million is allocated for Microsoft's spending. What if MS just picked 10 good game studios and paid them $1 million each to create killer exclusive games for WP? Like Bungie, Epic, Bioware, Robot Ent, etc... That's a pretty insanely high price tag for a mobile game isn't it? But imagine how cool it would be.
Then spent the other $90 million marketing that. And since it's considered a marketing expense, maybe those games could end up being free with the purchase of a Nokia Windows Phone.