In this game you click to earn skins to trade with and to collect. You receive a drop every 30 minutes, up to 4 a day. There is a short collection of developer-created skins, with an in-game workshop up-loader for the community to create their own skins for the Steam market.  You can also get achievements for playing!

Drop rates (not all rarities in-game yet):
Common: ~55.8%

Uncommon: ~33.48%

Rare: ~6.7%

Epic: ~2.23%

Exotic: ~1.12%

Legendary: ~0.54%

Mythical: ~0.14%

Divine: ~0.02%