Shares of ride-hailing and delivery leader Uber (UBER -3.27%) were initially doing much better than the plunging stock market today, with only moderate declines as of midday. However, in the afternoon, shares sank as much as 5.3% at one point, before recovering to a 4.4% decline by 2:26 p.m. ET.Midday, news came over the wires that the Federal Trade Commission (FTC) was suing the company over tactics for signing up users to its Uber One subscription service.Did Uber flout the Restore Online Shoppers' Confid ...