SummaryCompaniesByteDance sets valuation at over $330 billion for new share buyback, sources sayByteDance's revenue hits $48 billion in Q2, sources sayTikTok's US operations remain unprofitable, sources sayHONG KONG, Aug 27 (Reuters) - ByteDance, the owner of short-video app TikTok, is set to launch a new employee share buyback that will value the Chinese technology giant at more than $330 billion, driven by continued revenue growth, said three people with knowledge of the matter.The company pla...