Fwiw you can "favorite" comments - you need to select/"go to" the comment (click the timestamp) - then click "favorite". Like with stories, upvotes ar private,

Fwiw you can "favorite" comments - you need to select/"go to" the comment (click the timestamp) - then click "favorite". Like with stories, upvotes ar private, favourites are public: https://news.ycombinator.com/favorites?id=e12e&comments=t https://news.ycombinator.com/favorites?id=e12e&comments=t