Created a segment in klaviyo that’s around 70,000 emails/names/addresses and sync’d with FB via the integrations and created a new audience. FB audience mgr says that the audience is Less than 1000 AFTER Matching. 

I know there is definitely an issue hashing because this 70,000 segment contains ~15,000 email/names/address from another segment that resulted in a match of ~11,000.

I’ve tried deleting the sync on both sides (K & FB) and re-doing and got same result.

Just downloaded CSV of same 70,000 and giving a run at uploading it to FB to see if same occurs.  FB Audience Mgr says that it’s still populating but has already turned up 50,000 profiles. 

Any ideas as to why the integration isn’t netting the same results as uploading the CSV? 

For this particular segment, it’s not so important that it’s dynamic (adds/drops) but definitely has me wondering about other custom audiences in FB via syncs….