Sophomore slump: why is Netflix losing so many viewers for second seasons?
Netflix
(www.theguardian.com)
The other problem with Netflix: shows can't count on getting multi-season runs, so they try to tell a complete story in one season. If Netflix chooses to renew, they wing the rest and milk it for as much as they can get until it's eventually canceled.
Viewers are onto this and have a hard time getting invested in Netflix shows that go for multiple seasons, because quality drops and they'll probably get canceled anyways.