I was around at the time. Facebook started in 2004, I had my acct in 2005 when it was US colleges only. General availability began in 2007, and then came the fl

I was around at the time. Facebook started in 2004, I had my acct in 2005 when it was US colleges only. General availability began in 2007, and then came the flood of parents and grandparents, causing college students to rapidly sanitize their pages and switch communications to Messenger instead of posting directly on people's pages (then known as 'walls'). The flood of 'normal users' led to creation of "groups" and "pages", that were effectively blogs. Discoverability of Groups and Pages was far easier compared to climbing the SEO mountain, so many moved to FB. One of the biggest blogs/websites that moved were the webcomic The Oatmeal, and the author has written (or illustrated) what happened when he moved. https://theoatmeal.com/comics/reaching_people https://theoatmeal.com/comics/reaching_people