Not so long ago, 9GAG was providing RSS feeds. The functionality was removed, probably to force the users to visit the website or to download the app. Since I didn't want to do any of those, I started to build my own RSS feeds from their content. The project is now mature enough, so I decided to make it available for free to everyone. Similar projects already exist, but they didn't meet my requirements.
You will find below all feeds you can get at 9GAG, from the usual "Hot", "Trending" or "Fresh" feeds to the category-specific feeds. Feeds are updated every 2 minutes, and the last 200 posts are made accessible. Once again, it is a free service, and no advertisement is inserted at any point.
Add the feeds you want in your favorite feed reader, and you are good to go!
Most popular posts, over 9000 points. Only the best of 9GAG, so updates are less frequent.
Popular posts with at least 300 points. Regular updates, but some "not-so-really" interesting posts in the feed.
All posts in real time. Be the first to get the updates, but be ready to get a lot of crap. I wouldn't recommend, except if you really have time to waste ;-)