[dredmorbius]

In the months prior to the Google+ shutdown, I took several pulls of the full listing of Communities on the site via sitemaps files. Though not the same level of detail as profiles, this produced interesting results.

The total net number of communities was increasing by about 1 percent per month (80,000 communites added). At the same time, about four thousand communities per day were being removed (unavailable when queried in the 24 hours following the sitemaps pull), or 120,000/mo. Total (gross, not net) new community creation rate was quite high: 200,000/mo.

This continued until new community creation was disabled in February 2019, in advance of the site shutdown. Total communities numbered over 8.1 million at final count.

https://joindiaspora.com/posts/13767351

A pretty considerable level of churn.