They take a walk through the neighborhood. They seek out the advertising and capture treasures.

VOA: special.2010.06.04

as opposed to selling it through advertisements. Although, through advertising solely I should say.

而不是通过广告来卖。不过，我应当说只通过广告。

广告和价格的关系 - SpeakingMax英语口语达人

What do you think is the significance of advertising through social networks?

你觉得广告对社交网络的重要性在哪？

SNS和广告的关系 - SpeakingMax英语口语达人