Totally, totally pathetic. Twitter is no longer allowing promotion of "prohibited 3rd-party social media platforms" like Instagram, Mastodon, Facebook, Post, etc. Free speech! https://help.twitter.com/en/rules-and-policies/social-platforms-policy
Promotion of Alternative Social Platforms Policy | Twitter Help

@kottke but..but .. libural tears must flow at all costs /s
@kottke it is just so on brand that that page no longer exists…