I have heard from another rationalist that it was popularized by the occupy movement given that they had a lot of need for managing discussions with large amount of people.
Various communities have adopted it afterwards, because it seems good social tech.
It’s based on American sign language for applause (http://www.lifeprint.com/asl101/pages-signs/a/applause.htm).
I have heard from another rationalist that it was popularized by the occupy movement given that they had a lot of need for managing discussions with large amount of people.
Various communities have adopted it afterwards, because it seems good social tech.