Quora also started out as an awesome service just like Medium. Eventually though, the VC's need the promises they've heard during fundraising to be fulfilled. That's when the platforms start with the dark patterns. Non-VC companies are a longer and less glamorous slog to get off the ground but also don't come under pressure to compromise on their morals.
I don't write for Medium, but I think rather than trashing Medium, maybe we should help make it as a better platform for publishers. There is enough garbage out in the internet, maybe Medium can help clean it up.