Jan 14 (Reuters) - New users have piled in to Chinese social media app RedNote just days before a proposed U.S. ban on the popular social media app TikTok, as the lesser-known company rushes to capitalize on the sudden influx while walking a delicate line of moderating English-language content, sources told Reuters.In a live chat dubbed “TikTok Refugees” on RedNote on Monday, more than 50,000 American and Chinese users joined the room.Veteran Chinese users, with some sense of bewilderment, welco...