Facebook tried its hand at e-commerce before. It failed. Now, it’s ready to take another shot at it, primarily due to the rise of mobile. We’ve posted about this before, but this article from Business Insider chronicles Facebook’s early struggles with being a marketplace, why it failed, why it’s trying again, and the reason for and against its second run at e-commerce. It’s a lengthy read, but it gives us a great look at Facebook’s aspirations in being just a platform for things that go viral and your friends’ selfies.