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Amazon can be a 'necessary evil' for small retailers around the world

Elizabeth Schulze

"If you don't sell on Amazon, you don't have a big business," one U.K. retailer told CNBC. Hirschkorn oversees the U.K. operations of Gorilla Sports, a German-headquartered online retailer that sells sports equipment like free weights and cardio machines. "Basically if you're an online retailer in the U.K. you have no choice," Hirschkorn told CNBC's Beyond The Valley.