Google has claimed that its spam filters are discouraging spammers, after a decline in attmepts to spam Gmail users.
In a post on the Official Google Blog, Brad Taylor, Google "Spam Czar", claimed that:
"Attempts to spam Gmail users have been leveling off over the last year and more recently, even declining slightly."
A YouTube video, linked to in the blog post, seems to be pitching Gmail primarily at businesses, with an explanation of what Google spam filters do, in layman's terms.
In the video Google does not go into intellectual property concerns surrounding the use of its software by businesses.