Another internal Facebook memo leaks, China tells Facebook “not so fast,” Steam battles Discord, why the iPhone can’t compete in China, and a Y2K bug for the new millennium. Links:Departing Facebook Security Officer's Memo: "We Need To Be Willing To Pick Sides" (BuzzFeed News)China Said to Quickly Withdraw Approval for New Facebook Venture (NYTimes)Steam is rolling out its new Discord-like chat features to all users (The Verge)General Motors wants its customers to rent their cars to other people (The Verge)Why the iPhone can’t compete in India (The Verge)Big tech warns of 'Japan's millennium bug' ahead of Akihito's abdication (The Guardian)