Netflix have a careful balance of annoying existing customers vs bringing in extra money – I expect there’s a lot of parents sharing with a kid that’s moved out who will just pay the extra couple of dollars, because Netflix is right, they are account sharing and a couple of dollars is neither here or there for the parents, so they pay. I expect their detection will be reasonably forgiving and they’ll be looking to find obvious abuse use of their subscription. They have a lot of heuristics to make this decision off.
For example they’ll know if the device is a portable or static one. If there’s two profiles, signed in on two TVs and one profile is *only* used in New York and the other in California – often used *at the same time* in the evening, its probably not someone who travels for work a lot, and instead is a parent sharing their account with a kid who’s moved out. If, in a similar scenario, the device used in New York was a phone, and there’s a drop in use in California whenever the phone is used to view videos in New York – well that’s more likely to be someone travelling.
Some heuristics that could be used:
* IP location
* Other devices on network
* When and what is watched
* Simultaneous use
* Number of users
* Profiles
* Other accounts on the same network
* Device type
* Affluence of IP addresses
* Is the IP a University
* Movement of devices
* Sudden creation of new profiles used elsewhere
And many more……
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