有的免费游戏都需要一个能够让用户不断为之投入金钱的对象，而数字卡牌游戏则已经找到了这个生财之源，那就是扩展包。 根据玩家投票公司RapidPolls的调查，那些会为了数字卡牌游戏进行消费的人群，...
some free games are need a object that allows users to continue to invest the money, and digital card game has found the generative source, that is the expansion pack. According to the survey of the players voting company RapidPolls, those who will be in the consumer group for the digital card game,...
