I struggle to believe Netflix will gain any subscribers by showing Seinfeld or indeed lose any by not showing The Office or Friends.

For me, these are shows to have on in the background while I'm doing something else. I'm not watching them, but that's OK as I've seen them before and can easily dip in and out, while enjoying the odd familiar scene or joke. Personally, I have never watched Friends or The Office on Netflix, but I do this with Archer and The Thick Of It, P&R on Amazon Prime and Silicon Valley on Sky. If any of those shows were no longer on, I'd simply find something else to have on in the background.