FWIW, Medium doesn’t have login walls and hasn’t for a long time. Stories are either paywalled or they aren’t (author’s choice). This link is not paywalled and doesn’t require login.
Also, if an author wants an article to be eligible for inclusion in aggregated publications, they have to put it behind the login wall. It’s quite possible my info is outdated; happy to learn what the current state of affairs is if things have changed.