Youtube comments are the worst for written memes. The smaller or more niche the channel, the less it seems to occur. It's always a breath of fresh air to see informational/interesting comments on the smaller channels (and to have responsive Youtubers). I don't really use FB much so I don't know if it's equally as bad these days, in terms of memes as comments.

Regarding the Show HN, personally I'd like such a repo for WhatsApp conversations, but nothing work-related for the reasons others have mentioned.