Pinterest Inc. reported sales, profits and monthly active users that fell short of financial analysts’ estimates Thursday, initially sending shares down 14{21df340e03e388cc75c411746d1a214f72c176b221768b7ada42b4d751988996} in extended trading. Pinterest PINS, +1.49{21df340e03e388cc75c411746d1a214f72c176b221768b7ada42b4d751988996}  reported fourth-quarter earnings of $17.5 million, or 3 cents a share, on sales of $877.2 million, up 4{21df340e03e388cc75c411746d1a214f72c176b221768b7ada42b4d751988996} from $846.7 million in […]