Did anyone here use "facebook custom audiences" with "customer list" as the data source to advertise in the past? We are building an email list that we would like to target via FB & Instagram ads instead of cold outreach via email. In theory FB ads should be able to do that, but I would love to get feedback if that actually works or if that kind of targeting is a waste of ad-spend. 😅

@Nikolas Chapoupis It works very well and will drop your CPA significantly. We've done it a lot. The more data you provide, the better, particularly if you do a lookalike audience based on the custom audience.