Yo, Hacked on Friday, Just Hired One Of Its Hackers And Topped 1 Million Users

After an embarrassing dustup on Friday, the stupid-simple messaging service is beefing up security by hiring one of its hackers.

Yo, an awful but interesting messaging app that doesn't actually let you send messages, just crossed the million-user threshold since launching last Wednesday. Part of its enormous popularity is its aggressive approach to simplicity: All Yo does is send friends a push notification that says, plainly, "Yo."

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