I personally don't care about the copyright of my own work when it comes to code. I publish the majority of my work anonymously with a clause that just says something along the lines of "feel free to use some or all of this without any attribution." Denying others from using my code feels like it goes against the essence of OSS itself. It's like if I found the solution to some complicated math problem but didn't let anyone else see it because it's "mine."