right after #29C3, the 2012 Congress:https://web.archive.org/web/20221231004720/https://twitter.com/rysiekpl/status/285832342096973824
Between then and now, every Congress, every hacker camp, incessantly promoted Twitter. Invited people to tweet under the relevant hashtag, displayed tweets on at-venue screens all over the place, etc.
This year it's all fedi. Toots in #37C3 displayed along the @name@example.org address; npub1yfa75xcstxvhsp74lqa8r7jn8xvxc59jn79yf5zhe9d05a4xfylqkx0mc4 (npub1yfa…0mc4) (and possibly other fedi apps) getting their own info cards on these as well.
I waited for this for a decade.
#Fediverse