I would encourage you to read this article from the EFF. They do an excellent job of explaining material concerns regarding private censorship and chokepoints for the freedom of expression:
"Beyond Platforms: Private Censorship, Parler, and the Stack"
"Beyond Platforms: Private Censorship, Parler, and the Stack"
https://www.eff.org/deeplinks/2021/01/beyond-platforms-priva...