I thought this article was about your important question. When it comes to hitting a wall after the early adopters, the first thing I think of is photo sharing

I thought this article was about your important question. When it comes to hitting a wall after the early adopters, the first thing I think of is photo sharing. Wouldn't you think that would be one of the most widely-used services? Yet on Quantcast flickr shows 1/10 the monthly unique visitors of yahoo.com. In the top 100, only flickr, photobucket, and (arguably) facebook are photo-sharing sites. Shouldn't photo sharing have a wider appeal than blogging?