Dave Winer on users being the product, as in Facebook and Instagram:

But just to begin, for vendors it means charging users a fair price for a service provided. And in return, a promise not to aggregate the users into a fine pink slime that can be reconstituted into billions of Facebook dollars. And for users, it means deciding that we’re creating more than just little dots of pink slime on Zuck’s social graph.

I love how he threw pink slime in there.