CNBC: When Snapchat first offered ads on its platform in January 2015, it was asking brands to pay a minimum of $750,000 for a one-day ad. Today, however, is a different story. Prices have dropped far below that, to levels starting at $50,000 — and one media buyer said there is wiggle room to go below that threshold. Another source said that Snapchat gave them an ad for free, just because the team liked their idea.