I’ll finally be a heavy Pinterest user:
People use Pinterest and Instapaper for similar reasons. The similarity is almost too close for the deal to make sense. Pinterest started out as a way for people to collect content from around the web for themselves and others to check out later. At first, people were mainly saving images, but they’ve also started saving articles, to the point that Pinterest considers that “a core use case.” But saving articles is the same reason people use Instapaper — its “core use case,” if you will. So why would Pinterest buy a company whose product largely duplicates its own?
Because Instapaper stores the actual content, removing the need for people to leave its app to view it. And because eight-year-old Instapaper brings with it a bunch of insight into the articles that people save and read, which translates into data six-year-old Pinterest can use to get a better idea of what content it should recommend to its audience. That data could be combined with the data Pinterest already has on what content people like to post to and view on its service. And it could give Pinterest a way to try to rival Facebook as a popular place people go to find things to check out, be it wardrobe ideas, tattoo designs, how-to videos or news articles.
Source: How buying Instapaper could help Pinterest become a media portal like Facebook