It is often encouraged on this site to check with other posts to make sure your own isn't a duplicate, and since my expertise is quite limited at the moment, quite a number of mine do tend to be duplicates.
My question is, if I find someone else's previous post/answer useful, would it be considered bad form if I were to upvote it (as they would receive a random notification for an answer they wrote a few years ago and most likely forgot)?
I want to give credit where it's due but what would be an acceptable time frame so people don't get feel inundated by trivial posts, especially for those who probably answer at least 10 questions a day, which would build up to quite a number of notifications.