> I guess "joins" means created account..
I do think this statement would be accurate, you are "joining" if you create an account.
At least I don't see an argument for how creating an official account wouldn't count as "joining" - although it's admittedly boring if that's all they did.
I personally was confused, and initially thought Wikimedia joined corresponding orgs, became codebase contributor, etc. But maybe that's me not familiar with his topic.
This reads like the title of s ‘Beautiful journey… chosen to join [company]’ post.
https://hn.algolia.com/?q=%22joins+Twitter%22
Notable examples:
Bill Gates: https://news.ycombinator.com/item?id=1064772
Tim Berners-Lee: https://news.ycombinator.com/item?id=898727
The Pope: https://news.ycombinator.com/item?id=4897631
The CIA: https://news.ycombinator.com/item?id=7862990
Warren Buffet: https://news.ycombinator.com/item?id=5645650
It coexists with other uses.