It's an inversion of the old free sample promotion: Rather than giving away one brownie to sell 99 others, you give away 99 virtual penguins to sell one virtual igloo.
这是对以前那种免费赠品推广模式的颠覆：商家不是给出一块试吃蛋糕，希望把剩下的99块卖出去；而是送出去99只虚拟企鹅，以图卖出一栋虚拟小屋。
It's an inversion of the old free sample promotion: Rather than giving away one brownie to sell 99 others, you give away 99 virtual penguins to sell one virtual igloo.
这是对以前那种免费赠品推广模式的颠覆：商家不是给出一块试吃蛋糕，希望把剩下的99块卖出去；而是送出去99只虚拟企鹅，以图卖出一栋虚拟小屋。
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