Exactly how Netflix makes the call on what to renew or not is something of a mystery – it never releases ratings or viewer figures that would illuminate its decisions. Instead, everything is driven by top-secret data. Netflix notoriously number-crunches every bit of viewer interaction – what you watch, when you watch it, the device you watch it on (TV, PC, phone, tablet, smart microwave, whatever), how many episodes you watch in a row; even when you pause and for how long. It then uses this to inform production choices.- The Guardian