They do, and they also have something Twitter typically does not, which is purchase intent. Lots of people go go Pinterest because they are looking for ideas on

They do, and they also have something Twitter typically does not, which is purchase intent. Lots of people go go Pinterest because they are looking for ideas on something to buy. If they can find it and purchase it all in one place, that makes Pinterest valuable from a direct response marketing standpoint. Also, Pinterest's demographics are VERY desirable to marketers.