Private car booking service Uber has never been one to shy away from_a fight with competitors — the company has run some pretty dirty tricks in New York, for example — but now it is really upping the ante on Lyft and others after offering drivers from rival services $500 in hard cash, just for trying UberX out. “This month, we’re rolling out incentives and referral programs to prove it to every driver who joins Uber. For drivers currently on another ridesharing platform, we’re offering new partners $500 after they do just one trip on uberX. For drivers already partnering...

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