Just to get it going: here's a #substack and #substacker and #substacking hashtags
Suspect the new #substack chat function is going to worry the birdsite also
And I've a substack at https://brainpizza.substack.com/ with thousands of readers. Easy signup.
Also download the elegant substack app in Android and iOS - designed for readers 👍

#medtwitter informed us beginning in 2020. Thankfully Dr. Eric Topol began #substacking daily as a backup to (an already doomed) twitter about 3 days ago. All of these are worth reading https://open.substack.com/pub/erictopol/p/pandemic-daily-update-3-november?r=2fhpe&utm_medium=ios&utm_campaign=post 1/