Facebook's AEO campaigns use market-wide data (all apps passing event data) on its standard event mappings to help target users in AEO optimization.
But does the degree to which Facebook uses market-wide data to target AEO shift significantly to an ad account's history instead of the market history, once an account has enough data? If so when/how much?
This use of market-wide data to power AEO seems to differ from what Google does, which is to prioritize use of an ad account's event data. This seems to present an opportunity for kick-starting targeting of AEO in Facebook vs Google, but limits the viability of targeting custom events in AEO that don't neatly fit a standard Facebook event mapping.