Information is definitely out-dated, and you shouldn't really take it to heart.
The Golden Skin was a skin specifically for the M93R. This skin has since then been removed due to the M93R being converted into a mesh.
The picture that is currently being used is a recreation of what the skin looked like — it is not the actual skin.
It's rumoured that the M4A1 had a Golden Skin too.
Anyone who somehow bought this was permanently banned, as the only way you could buy it was through glitches.
If you have bought The Golden Skin and have been banned, please contact Jopede and he will unban you.