I can’t officially put a Creative Commons on most of my memes. But my memes are fine to share. If I feel particularly proud I put a watermark in it. Not because I want people to think “oh that meme is stolen.” But I want people to know it was my doing.
The only memes anyone truly "owns" are the ones that never get posted, like that stockpile of overly angsty and unrelatable rage comics I made back in the early 2010s. But then, is a meme that never gets posted even a meme at all?
This is the mindset behind communism. It's easy to feel this way when you take away the need to make a profit off your labor. You get to be happy for the appreciation of your work and not worry about possible income being stolen. Life is happier when money doesn't exist.