To counter Uber, Didi employed very aggressive techniques including hacking Uber’s app to send it fake riders. The Chinese law on the tactic wasn’t entirely clear. The Chinese branch of Uber countered by hacking Didi right back. Uber then brought those techniques home to the United States by hacking Lyft with a program known as Hell, which inserted fake riders into Lyft’s system while simultaneously funneling Uber the information it needed to recruit Lyft drivers.
