Since launching his original bid in April, Musk has said that owning Twitter is more about preserving the platform as an open venue for “free speech” — not to mention solving its spam problem, which apparently irritates Musk as a heavy user — than about making money. However, over the summer, Musk hinted at a bigger plan for Twitter: turning it into the backbone of a WeChat-style “super app” that acts as an operating system for people’s digital lives.