I can tell you they aren't doing anything funny. I have been pinning items from my site (I feel a bit of shame when I do this). Now that they have millions of u

I can tell you they aren't doing anything funny. I have been pinning items from my site (I feel a bit of shame when I do this). Now that they have millions of users, your pin gets lost within millions of pins unless someone who has lots of followers repins you. I have figured I could get around 1000 visits to my site daily from Pinterest by pinning around 200-300 items, assuming 10 of them become hits. But the traffic is not really sticky.