This happens all over reddit. Some topics don't have enough to post and talk about to satiate the amount of interest on reddit. So you end up with these lopsided chunks of time where something interesting is done to death. This is compounded by the fact that posts with photos are the most engaged with to an overwhelmingly staggering degree.

I was a member of the monitors subreddit for a bit. Lots of complaints about what people were posting (like troubleshooting). As it turns out, monitors are hardly interesting enough to warranty multiple daily posts.