Is “members-only” something writers can opt in to? That’s the impression I’m getting on this, but it’s difficult to find definite confirmation, though I finally find what I think is confirmation in the “Become a member to unlock a new layer of Medium:” section of https://medium.com/membership.

Alas, this evasive approach to disclosing precise information seems so often to be the case once money is involved; just yesterday I had to delve deep (as far as the T&Cs) to confirm that Zoos Victoria’s advertised “$9/month” membership actually means “$108/year, but you can pay in monthly instalments if you like”.