Part of this is due to many having their votes set to do so using a bot. I wonder at times how much content is actually read that has votes.
Another aspect is many like myself, who have little SP in the scheme of things, and this limits how much voting we have at our disposal. I vote for your posts sometimes, but I find I often have to leave some posts unvoted. Especially if I interact with some (as I am here) and they reply. I usually vote replies despite it burning the vote for being dust.
I appreciate your conduct here, and at times am smart enough to understand the topics you cover. Understand if it becomes to much, but sometimes my lack of vote is not due to disinterest or ignorance on the topic at hand.