Annoyed with the ad deluge on social networks, many users are spending less time on the sites. 

…the forecasts for torrid growth may prove unrealistic. Besides the slowing user growth and declining time spent on these sites, users appear to be growing less responsive to ads, according to several advertisers and online placement firms. If advertisers can’t figure out how to reverse these trends, social networking could end up as a niche market in the online ad world, smashing hopes and valuations across Silicon Valley.

http://search.businessweek.com/Search?searchTerm=Generation+MySpace+fed+up&resultsPerPage=20

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Robert Scoble, who has long been proud of the fact that his popular blog remains free of advertisements or sponsorships, will soon put ads on his site, he told me yesterday.The change comes as part of his move to Fast Company, who will sell the ads on his behalf and will also be redesigning the site.

Scoble and Dave Winer have been the main proponents of advertising-free blogs over the years, arguing that it creates conflicts that should be avoided. In 2005, when we first put ads on TechCrunch, Winer wrote a long comment expressing disappointment and regretting linking to the site, and followed up with a podcast on the issue. He’s been writing about this since at least 2000.

This isn’t the first time Scoble has run into issues around financial conflicts of interest, but it’s the first time it directly involved his personal blog. So Scoble has changed his tune. Will Winer be next? http://www.techcrunch.com/2008/01/25/scoble-sells-out/