(Oct. 11th): Most effective Facebook Ads (Normal vs. Custom Audience vs. Exchange)

Back in September Facebook launched Custom Audience ads, which was a way to import an e-mail, id or phone numbers list as a target audience for Facebook Ads and then filter it by pages those people liked, their age etc... The article below shows, that this Custom Audience Ad option gives better (cheaper) results than normal ads. It is not, however, better than Facebook Exchange, which is a retargeting platform, based on cookies.
So, effectivewise: Facebook Exchange > Facebook Custom Audience > Facebook normal Ads
Here are the details:
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