One specific, problematic issue is that when individual online stores pin their own content, it is unlikely they would insert an affiliate code. But if the store has an affiliate program, it is highly likely that those links now will have an affiliate code in them that gives Pinterest a percentage of any sales. Not disclosing this modification is putting individual stores at a disadvantage when they and their customers are putting in the work of adding pins.
Pinterest is quietly generating revenue by modifying user submitted pins. | LL Social
