I did a poll and nearly 30% of the people who voted said they used Sync! It's stayed around that percent the whole time too!
EDIT: Here is the poll I forgot to put this here like five times lol https://strawpoll.com/wby5A21R1yA
As a former Redditor myself, I'm not going to be able to answer that question. I do agree, though: users don't magically come out of nowhere.