Streaming was great when I only needed to subscribe to a single service to watch most everything I wanted. It's not so great when I need to subscribe to 5+ services and still not have everything I want to watch.
Yeah, monopolies are bad but the way IP is distributed right now across so many different services just ends up being worse for consumers.
I'm sure that's true, but the flip side is that the niche stuff is what pulls in the hardcore film buffs. And guess who those of us who aren't big film buffs turn to when picking films and services? The hardcore film buffs we know.
They may not generate a ton of revenue if you look only at "how many people request obscure movie X", but having those movies pulls in the people who will, in turn, influence others.
I suspect they're (like Netflix used to) creating an illusion of choice of a wide range of options as you walk to the big shelf in the middle of the shop that has 100 copies of the book that's currently selling well.
Also the fact that physical book shops are still somehow a thing helps. I guess people like the experience.
Amazon was that way for me. I went to record (music) stores to buy my music in the 1990's. I started buying music from Amazon in 1996 because they had the stuff I couldn't find in the record stores.