Lemmy on June 9th. The day before reddit died. There were 1.21k users on this instance back then. All of Lemmy looked like it was less than around 5-6k users total, and most were not active. There were less than a dozen communities I would call active, on all major instances combined. Beehaw and .ml were the biggest, but that is not saying much at the time. Kbin was totally defederated from everyone back then.