[TeMPOraL]

Seconded. I do the same. I also do this whenever I have to explore a new domain of interest, to quickly find my bearings and some high-quality sources to continue with.

This works especially well if the domain is not niche, but has wide general-population applicability. Say, dieting. The amount of content-marketing bullshit on the general Internet makes general topical searches near useless. Whereas just browsing the collected knowledge (pinned posts, wikis) of various dieting subreddits let me quickly find one appropriate regime for me, and then its specific subreddit taught me how to apply it safely.

(Yes, it was /r/keto, and yes, it worked.)