Big internet companies ( Google, Yahoo, Microsoft, Amazon, Apple) are now in a frenzy purchase of content. The reason is that content attracts traffic and traffic is what they sell. The more content, the better. And since making content is expensive, they rely on the crowd to create the content. However, one of the internet’s dirty secret is that what the crowd sources is mostly content made by others and repurposes illegally.
Take Tumblr for example. The majority of the Tumblr blogs are made of user curated content taken from other sites. They repost what they like and Tumblr makes it very easy to do so. But in the process, they steal content unlawfully. Photographs, mainly. Created by pros.