This article is not an exclusive (but some on medium are), so here's the canonical non-paywalled version:

https://pluralistic.net/2021/10/08/unfollow-everything/#shut...

Cory seems to be up front about the conditions of his various forms of publishing:

How to get Pluralistic:[0]

Blog (no ads, tracking, or data-collection):

Pluralistic.net

Newsletter (no ads, tracking, or data-collection):

https://pluralistic.net/plura-list

Mastodon (no ads, tracking, or data-collection):

https://mamot.fr/web/accounts/303320

Medium (no ads, paywalled):

https://doctorow.medium.com/

Twitter (mass-scale, unrestricted, third-party surveillance and advertising):

https://twitter.com/doctorow

Tumblr (mass-scale, unrestricted, third-party surveillance and advertising):

[0] https://pluralistic.net/2021/05/05/clarkes-third-law/