From https://www.redditinc.com/blog/https-www.redditinc.com-apifacts:

As of now, more than 80% of our top 5,000 communities (by DAU) are open

The 48 hour blackout that was popularized was a complete joke and reminds me of all the corporations that change their social media pictures to pride-themed photos for like 2 days then revert back to not caring at all. Reddit literally did not give two shits about 2 days of ad revenue being gone because they knew it would be back to normal before most people even noticed.