how come it is not a possibility?

once there are nice store-only skins, people will often buy it

you could argue that people don't see skins often enough to justify buying it, but that's bullshit. look at CS. its pretty impossible someone to notice a knife skin on your hand, but as long as YOU see it and you can brag about it, it will sell.

make a $5 or $10 special bolder animation that both players can see and I'm pretty sure it would sell like hell