So the overall consensus is that it's similar to CSS (And other counter strike games), newer and more serious?
Doesn't sound like my type of thing, I mean even CSS gungame is too much for me in my old age!
You dont have to be a professional or hardcore while playing it. You can muck around in competitive and make everyone lose if you want. Its a lot more of a safer environment than that extremeist trading game, I think its called dota.
Be careful buying keys from external sites, gog, gmg, are legit examples, but some dodgy sites sell steam keys from russia which had been bought with stolen data and get your account frozen.