[cageface]

But are people posting photos of the kinds of things that sell in large volumes and generate a lot of revenue? The attraction of a lot of these sites is that they initially feel like a cosy insider community but that feeling fades fast as they become mainstream. This is happening to FB already.

Are people going to be posting and clicking on pictures of ketchup or cleaning products or life insurance policies?

[koeselitz]

Given the (sizeable) advertising contracts Pinterest has already landed, people are posting and clicking on pictures of awesome clothes they like and might want to own, and other luxury stuff like cooking utensils; movies and books also seem to be pretty popular, and I've seen a lot of character diagrams from TV shows and fantasy series.

Yeah, there are certainly random things like ketchup and cleaning products and life insurance policies that don't lend themselves well to selling via images on the internet. But that has nothing to do with Pinterest; and given some time, somebody will probably figure out the angles for life insurance and ketchup.