It depends on what kind of cloaker you're using. If the cloaker has the ability to hide your Landing Page from the Ad Network while simultaneously tracking your conversions then so be it. But most cloakers dont have to ability or provide that feature. If you add any sort of pixel to your landing page, facebook, google or bing will find out your LP and mostly ban your account. People that usually use cloakers already know their campaigns are profitable and just need to cloaker in order to get their LPs approved on the Ad Network.