It's really not that crazy. You log onto a server, the server communicates your skins to the other clients. Counter strike itself literally did this in the 2000s, it was removed. Modders for other games working for free figured it out. Games used to automatically download maps and skins in a bunch of Valve games as well as other games.

I would also consider building comments into a webpage pretty trivial, it was like the second thing I did when teaching myself web applications years ago.

I bet it's harder in modern frameworks than it used to be, but that doesn't make it a hard problem, we just surrounded an easy problem with more difficult but unrelated problems.