Sort:  

The Steemit slack. The one that used to have a link to it in the Steemit main menu.

Lucky you :) or maybe not so much based on the discussions in the screenshots. :)

Well when and how did you join? It's been under maintenance for a couple weeks.

I joined about a week before it got taken down. Like I said, there was a link to it in the Steemit main menu. I clicked that. I joined. Simple enough.