Pretty sure Signal and Psiphon use it successfully. Yes it's throttled, but it's usable most of the time. They probably got an ultimatum from Chinese authoriti

Pretty sure Signal and Psiphon use it successfully. Yes it's throttled, but it's usable most of the time. They probably got an ultimatum from Chinese authorities to either stop allowing this or get blocked entirely. They just blocked wikipedia last week.. no one is too big to get shutdown in China