If you use images or photos on any of your sites, you’re already on Pinterest, whether you’ve registered on Pinterest or not. So, what are you going to do about it?
If you’re not on Pinterest, you’re already losing control of your visual brand as we speak by virtue of not participating. Pinterest is going to push you to better brand your content and IP in such a way that people know where that content is from without imposing grotesque watermarks, oversize copyright notices, or garish splashes of brand that takes away attention from the message in the image.