Getting 1000 people to your site one time is not nearly as valuable as getting 10 people to visit your site 100 times, or even 100 people to visit 10 times. To reiterate, social networking is not a worthless activity, but so many people place way way way too much emphasis on it for business. Advertisers would rather have 1000 people see their ads once than 10 people see the same ad 100 times. Right. TT might be right if you were selling something here at the site, but with pure advertising as revenue, it's number of eyeballs that is most needed.