In the case of Netflix, I'd say it's different because Netflix has brought that lack of trust on themselves. They even made a small statement about how they didn't want to cancel shows without giving them conclusions then outside of a couple of high profile cases they went on to not change their behaviour at all. (Which was obviously going to be the case, so I don't know why they lied about trying to give shows conclusions).

Authors on the other hand aren't a monolith, George RR Martin isn't responsible for what any other writer promises and visa versa so it's not fair to decide not to read someone else's books because GRRM took a while to write a couple of books.