Pinterest: Not Exactly Getting It, Either

I wrote earlier about not exactly getting the need for Path. Pinterest, near as I can tell, is a way to collect links to things I find are of interest to me. But then what? Do people curate their boards all day? What does it do? Do you hope that people come by and say, "Hey, I like Batman, too!" or what?

WHY do you use Pinterest, is my question? Is it kind of like the feeling of making a magazine happen, only you're the one putting it together? Give me some context.
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