I like the fact that Valve makes it a point to share with us and the industry it's market and analysis. They seem to really want to help shape how our gaming gets delivered to us and enjoyed. Many companies would have put all these ace cards Valve is putting in press releases under their sleeve and told no one.
I think we should all appreciate that a private company is willing to share its researched trends and sales data with the masses. Yes I know they don't give actual numbers, but they show the result of their crunching those numbers. This can defintiely help other developers, programmers, etc to find a somewhat good baseline to adopt their own personal trends and expectations to delivering content to this gaming community.
Yea they have their own agenda, but they are also sharing stuff they really don't have to.