It wasn’t much of a refund. But in this case it might be the thought that counts.
Facebook is cutting checks to advertisers after it found a flaw in the way it measures certain video. It’s the first time Facebook has been public about a problem measuring ads that involved billing since it started disclosing such reporting errors last year. Previously the discrepancies affected unpaid posts.
Facebook said it found that over a period of about a year it was miscounting a specific type of video ad on its mobile website only — not in its app, where most people and brands use the social network. On the mobile web, which mostly covers people logged into Facebook in browsers on phones, advertisers were wrongly charged when people clicked on their videos.
Source:: AdAge – Digital