And every year, like some sort of magic clockwork, it does more and more for less and less, bringing the marginal costs of technology in the units that we individuals consume closer to zero.

每年，就像某些神奇的发条装置一样，它能以越来越少的成本做越来越多的事情；由于大规模消费的存在，技术的单位边际成本渐趋于零。

youdao

In more jargony terms, social marketing is just great for producers with fixed costs and near zero marginal costs.

FORBES: Beware Groupon