Hi, I have ads running on three subreddits right now, the smallest one has only 1,460 readers. Considering the CTR (click-through rate) I guess putting ads on subreddits smaller than that might not be worth it, even if that ad has been live for over a week it's still at less than 400 impressions/views.
As a reference, I have an ad on the /r/programming/ as well with 678,120 readers, that one has 113,613 impressions/views during the same time period.
This is incorrect. I have placed ads on /r/postmates, which is a small subreddit. You can't target some of the really tiny ones because they lack volume. I think it also "remembers" which subreddits you've visits, and also uses that to target.
That said their ad targeting system is quite bad in other ways.
I just tried to place an ad for /r/pics and /r/gaming and had no problem getting to "pending ad approval"
EDIT: I'm an idiot.
> if it's not one of the big ones
I'm pretty sure r/pics and r/gaming are two of the biggest subreddits out there.
Those are huge subreddits, both around 12MM subscribers.
Would someone please confirm this? If true, wow.