Streaming giant Netflix is notable for some of its unusual company guidelines—for example, the lack of an expense and holiday policy, and its well-known “keeper test.” It’s the latter notion that Netflix managers are being asked to revisit, after the company announced an update to its culture strategy yesterday. Netflix outlined its keeper test, which pushes managers to ask themselves: “If X wanted to leave, would I fight to keep them?” Or “Knowing everything I know today, would I hire X again?”...