I upvote many things that I already know of to let others become aware of them. It's a bit like xkcd #1053 [1], when I encourage others to read about something,

I upvote many things that I already know of to let others become aware of them. It's a bit like xkcd #1053 [1], when I encourage others to read about something, they might then write comments about that thing offering new insights etc. that is of value to me. Additionally, them having become aware of that thing now might lead to them caring about that thing and doing something related to that thing that is of value to me in the future. But really my primary motivation is simply that I think that things I like deserve that I upvote them so that others can enjoy those things too regardless of future utility to me. [1]: https://xkcd.com/1053/ https://xkcd.com/1053/