On a site where people share pictures of stuff they want to buy, it makes sense that people who make stuff would want to share it themselves. And so Pinterest is full of businesses posting their own content and products. The company is formally acknowledging this kind of use by adding business accounts. As of Wednesday, business users and normal users will have separate tools and terms. What’s remarkable is that prior to now, commercial usage of Pinterest was prohibited, according to its terms of service. Read the full story at All Things D.