One of the larger conversations we have with clients when it comes to Reddit, is that just because a specific subreddit has a lot of subscribers, doesn’t mean it is really that active.
It is better to have your content submitted to a subreddit that has only 10,000 subscribers, but 5,000 active, than a large subreddit with 100,000+ subscriber but only a few hundred actually participating.
Take /r/business for example, which was one of the original subreddits created, and has over 110,000 readers. However, the subreddit is virtually dead and even being prominent on the main page for the subreddit will result in very few votes, comments, or visits.
So how do you know what subreddits are active and which are not?
Well for a while we have used some internal tools that allow us to determine the activity level of all the subreddits, but you could also tell by simply looking at the subreddits main page. If you notice submissions with less than 10 votes and over 6 hours old in the top 15 results, then the subreddit is most likely inactive.
As of last week, Reddit has launched a new feature on its subreddits, which show the number of online users at any given time.
Not only can this help you in determining what subreddit to submit to, but it can also help you to determine what time of day might be best for your submission.
Please avoid submitting to subreddits that are off topic for your content and please review the subreddit rules prior to any submissions. Reddit is not forgiving on these two accounts and failing to respect these points will result in your content being seen by 0 users (as your content or you will end up filtered or banned!).