Hi Jack,

Luke from the Product team here. Thanks for submitting this feature request. 

We don't have this planned at this time. We will continue to collect customer demand to justify building this. Every upvote on this request increases the case to build it.

Fivetran does not support loading data into Facebook Ads because its core functionality is centered around data extraction and synchronization from various sources to a central data store, rather than pushing data back into external platforms like Facebook Ads. Loading data into Facebook Ads involves different technical requirements and permissions that Fivetran's Facebook connector and destination writers are not designed to handle.

Additionally, there are specific permissions and terms of service on the Facebook side that need to be accepted, which can complicate the process of accessing or modifying custom audience data. Our focus remains on providing robust data integration solutions that facilitate data movement into data warehouses or other destinations, rather than managing data within third-party advertising platforms.

Cheers,
Luke