I think the explanation here is that Facebook tracks clicks on the banners on their site while the author of this post tracks page views using GA or other tools. These are two different metrics. In between lies (at least one) redirect (from Facebooks click tracker to your website) plus a full load of your website.
There are a lot of visitors who click but never make it to the second link: Be it because they accidentally pressed the link (very likely) or because they decided otherwise and aborted.<p>I&#x27;d still go with your conclusion that it is difficult for the advertisers to track whether the ads pay of if you are paying per click.
I would not go as far and say that Facebook is doing fraud or scam.