Dota 2 mod skin trully works or is it just a spyware

So I started to play ranked, the matchmaking only allows me to play support roles, but I already played a plenty of games already and the carry roles are still locked. What should I do?

I see a lot of people with fancy skins that costs 100, 200 dollars. Is it there any other way to get skins than buying them directly in the shop?