The tough logic of capitalism prevails even at the heart of the sharing economy. As nice as it may be to share, no one gives away anything for free. Credit: Flickr/Remo Cassella. No changes made. Shared under a CC 2.0 license, some rights reserved. A year ago, I responded to Antonio Negri’s presentation at the Berliner Schaubühne, where two critiques of capitalism collided. Negri had enthused abou