There are millions of subreddits, but with the volume of subreddits "dark" and some of the largest ones joining in, it's likely to have had a significant effect

There are millions of subreddits, but with the volume of subreddits "dark" and some of the largest ones joining in, it's likely to have had a significant effect on a majority of Reddit users, and a decent part of the wider internet. Cumulatively (adding up the member counts), 3 billion "accounts"/subscriptions have been effected. 8k is very significant