how to understand blow ?
From a total gaming content perspective, the NPD has issued an estimate of .4 to .6 billion (roughly flat with 2009) – this is the total consumer spend on gaming content via all monetization methods, including new physical video and PC games, used games, game rentals, subscriptions, digital full-game downloads, social network games, downloadable content, and mobile game apps. A final estimate will be issued in March, NPD stated.

You mean ‘below’ not ‘blow’?