>>397298761
Because VRC has fucking terrible social functions for social game Twitter became the de facto standard social tool for it. It costs nothung to make account, can be kept pretty anonymous with proper settings and lets you upload pictures, videos and short comments. And because you can put Twitter link in VRC profile it's easy to add your friends and keep up with whatever events and shit is happening. If VRC had proper forum or some shit nobody would need Twitter to do what normal game forums are meant to do.