 Cards can be "crafted" to acquire Steam-centric awards such as emoticons or profile backgrounds, traded to other Steam users, or sold through the Steam Community Market for store credit.Since their introduction in 2013, Steam Trading Card sets have been integrated into over 7,000 games.The developer revenue gained through trading card sales has attracted undesirable attention from "asset flippers"; developers who release low-quality games onto Steam solely to profit from their trading cards.