In my companies and for my clients, I track up-tick in sales for each campaign on each platform. Sometimes the problem is conversion (that's on me/us), and some

In my companies and for my clients, I track up-tick in sales for each campaign on each platform. Sometimes the problem is conversion (that's on me/us), and sometimes bad targeting or whatever. If FB isn't one of the lowest channels (platforms) for CAC that is greatly exceeded by LTV (or even <3 mo breakeven), then it isn't a channel you use for that product!