My observation ... It's more than a simple "Thanks" getting downvoted. People regularly say thanks, but not simply for links like this. Your upvote suffices.

My observation ... It's more than a simple "Thanks" getting downvoted. People regularly say thanks, but not simply for links like this. Your upvote suffices. However, if you've had a specific exchange with someone, and they've specifically replied, then a "Thanks" is welcome and accepted.