http://kickback.com/invite/CoiNIf you want to earn some skins by playing 5vs5 or 1vs1's you can use this website, if you use my referral link that would be awesome.
When you sign up you basically earn like 55 rubies or more depending how you sign up.
Then you can do matches against people 1vs1, you put 10 rubies into the match, and the opponent puts 10 rubies, winner takes it all. You can win upto 800 rubies per 1vs1.
Use my referral link and you get extra +50 rubies with your signup!