I personally never browsed TIHI. It was always one of those where linking it was more of a meme than actually browsing it in my mind. Similar to how a lot of people would comment “/r/unexpectedjohnmulaney” but very few people were actually subbed to /r/unexpectedjohnmulaney. Because who the heck wants a bunch of pictures of comments referencing John Mulaney jokes in their feed? It’s the old “subreddits as hashtags” bit.
All that being said, it sucks because I know TIHI actually had more of a community than most “hashtaggy” subreddits. My understanding is it was a bit like a blend of ATBGE, MildlyInfuriating, CursedImages, or DIWhy.
Reddit is killing real communities, and killing their own history in the process. All those comments throughout the ages linking “/r/TIHI” now link to a dead sub. As much as I may have found those comments annoying, there were people out there who would click that link and go browse or maybe even subscribe to TIHI as a result of those comments.