I have never made an income on Medium and my stories receive barely any distribution so I cannot speak to changes in income- no income is still the same.
I feel the membership is worth it for the reading and community.
However as the platform expands its subscribers the quality of the experience goes down, even though it is still worth it. The platform can only afford to provide an income for the few and yet wants to expand, expand, expand, in competition with other corporate platforms doing the same thing.
Who knows where that leads?