I am a very late, HIGHLY reluctant participant in social media. I’m one of the few people I know that does not have, and has NEVER had, a FB, twitter, Snapchat, Instagram, etc. account. None of them. The closest I get is here/FTC and reddit. And I was a (relatively) late-comer to reddit, having joined in what was the great Digg exodus, though that was just coincidental timing on my part.
So I never really remember to 
or upvote. But I find lately I’ve been taking note of it, and trying to return the favor, because it seems, I dunno… social?
For me it means “I have read your post and value its addition to the discussion.” without any particular endorsement of its content.
