Fraudware detected on 994,061 computers
As reported by Microsoft:
http://blogs.technet.com/mmpc/archive/2008/11/19/msrt-review-on-win32-fakesecsen-rogues.aspx
The figures relate to what Microsoft has labelled "Win32/FakeSecSen". That figure does not (I think) encompass all of the fraudware (fake security software) products that are out there.
Just imagine, if you will, if just 1% of the owners of those detected machines were fooled into buying the fraudware software at $40 a pop - that's $397,624.40 in illicit income garnered by the crooks. When we take into account the fact that billing services such as the (now defunct?) Bucksbill were regularly accused of double-charging victim's credit cards, then we're looking at an illicit income of $795,248.80.
Scary, isn't it. Is it any wonder the crooks behind malvertizing are so persistent?