That is not true. It is based more on reputation. May be you should first learn more about it before spreading misinformation : http://blogs.msdn.com/b/ie/archive/2011/05/17/smartscreen-17...
Russian entrepreneurs get to pay off their national Mafia, while Windows developers get to pay off Symantec. Life goes on, I suppose. But they'd receive fewer complaints if digital signing didn't only improve reputation "twice as fast," whatever that means, in the words of the blog entry you linked to. The opacity of the process is as offensive as the core idea of basing reputation on how commonly something is downloaded.