Given all the crossed allegiances, going from the Facebook family to the Twitter one (while nominally staying inside the Facebook one at Nanigans) was no small step, and nobody in this picture, neither Facebook nor Nanigans, was bound to be very happy about it. What Twitter was asking was just shy of a breach of confidentiality, and absolute corporate treason. Just shy, which was how Silicon Valley worked. I signed the offer without negotiation, and emailed Kevin Weil to convey my eagerness to get started with Twitter. He reciprocated that excitement, and suggested a time to meet with the Twitter Ads product team. I was working for Twitter now, against Facebook’s interests, two years after very insultingly doing the opposite. At the same time I was also working for Facebook’s largest ads partner and biggest single pipe of cash. The Land of the Stateless Machines, indeed.