If you still want an estimate you can check on Steam Spy. Source: about 1 year ago

I think Valve will shut it down once it learns about the monetization. AFAIK that is what happened to https://steamspy.com/ when they introduced paid subscription tier. - Source: Hacker News / over 1 year ago

If you still want to see numbers, you can try with Steam Spy with VN available on steam. Most of the developers say that those numbers are false. Source: over 1 year ago

Research popular game genres, for example on https://steamspy.com, and find a genre that currently sells well. Source: almost 2 years ago

Steam Spy - must have tool for anyone who wants to get some data about Steam games. Source: almost 2 years ago

Also, being on reddit is a pretty big challenge. In the top 10 subs, /r/gaming is number 4, with more than 36 million people. Source: over 1 year ago

As someone who's had visual snow for over 20 years and never linked it with other symptoms that are described in the study, my mind is blown. I've skimmed halfway thru the study and have tears in my eyes reading this, because for years I've not been able to figure out why I've felt so weird...and mostly just try not to think about it (but I'm always worried about it in the back of my mind). So random too, just... Source: over 1 year ago

Not really a subreddit, but can help: http://redditlist.com/. Source: over 1 year ago

Http://redditlist.com has a good list of subs, you can sort by popularity. Source: over 1 year ago

Or websites that track subreddits activity. Source: over 1 year ago