basically this; you can buy stranges and unusuals which will make you look good
that's debatable
whenever i see somebody with a unusual i don't go "oh wow he has a unusual he's so cool" i could care less about the hat they have. I play the game for the game not to collect the hats
and i only use two stranges one i un-boxed with a key bought from selling cards and the other i bought a strangifer for also from selling cards
so no i haven't spent any money on this game
besides hats still don't make it p2w because your not any better than anybody
and name one f2p game that doesn't have premium cosmetics
also please note that you can not buy a unusual outright from valve themselves all the prices for unusual are user-generated