[dghf]

Lots of assumptions, presumptions, guesses and maybes here, but:

- Netflix's licences to stream shows are presumably for a limited period of time.

- There's only so much money in the pot, and they want to spend it on the renewals and new acquisitions they think mostly likely to retain existing subscribers and attract new ones.

- Sometimes the rights owner may not want to renew Netflix's licence: they may strike an exclusive deal with another platform, or may feel that having the show on Netflix is cannibalising their DVD sales.