You're assuming that the only purpose of the post is so people can copy the palette outright. I see it more as a way of educating oneself of what others have do

You're assuming that the only purpose of the post is so people can copy the palette outright. I see it more as a way of educating oneself of what others have done to see what works and what doesn't. If you like an artist's work, it's worth analyzing what they do so you can incorporate ideas into your own work (or not).