We are pleased to be participating in Steam's Trading Card system. A world of collecting, crafting, and content awaits you!
There are Warframe emoticons, profile background, and badges awaiting your discovery. Happy collecting, Tenno!
More information about Steam Trading Cards can be found at the following links.
- Official Steam News: http://store.steampowered.com/news/10946/
- Steam Trading Cards Page: http://steamcommunity.com/tradingcards/
- FAQ: http://steamcommunity.com/tradingcards/faq/
As a bit of clarification, only purchases made via the Steam Wallet are eligible to unlock trading card drops. if you made a purchase of any amount via Steam Wallet before June 26th 2013, you are grandfathered in as a "paying user" by Steam and you get 4 card drops. If you haven't spent money via the Steam Wallet prior to today then you are not currently eligible for a card drop.
Going forward, for every $9 that you spend on Warframe via Steam Wallet you will be eligible for one card drop.
This is a Steam Initiative that we're participating in and they are in complete control of how card drops are earned.