I supported the idea behind it, I still do, but I don't think the end product is for me. So far.
One of the best things about membership at the beginning was the new version of the homepage, the organisation and customisation was significantly better.
But this is now available to all users.
Although my Medium usage has significantly dropped off I had intended keeping my membership going. Then I realised something: I've only read one or possibly two members-only, funded stories.
I don't know if it's because the types of stories I want to read aren't funded yet or because a lot of the funded content is very US centric but it wasn't a good fit.
So, for now, I'll just wish Medium the very best and hope it continues to develop and improve. If that happens maybe I'll sign up again in future.