A bank in China has been barred from trying to lure customers by giving away these wildly popular Leubu dolls. Financial institutions like Ping and Bank are trying to capitalize on raging demand for PopMart's monster characters with a life-siz collectible recently fetching $150,000 at auction. Regulators stepped in to shut down the marketing stunt, Bloomberg News reported, citing sources who said these giveaway practices drive up costs and hurt margins.But the promotional tactic of resorting to Leubu dolls ...