Interesting as I (like you) always upvote the best memes/content as I support that person's outlook and interpretation. I want others to notice and enjoy it so try to garner attention to it. I really hadn't considered competition as a possibility, but you are right to bring it up, D. :)
I do understand on political stuff, why a person would not want to upvote memes if they are gainfully employed and do not want a trail. I totally respect that approach today. I am lucky as I don't work and am able to say what I believe without repercussion.