We have an initial automated company match process which goes through and removes companies that do not match with any of the company names in our database as well as duplicates. Then, we go through manually and double-check that the inputted company names match the outputted matched company names from our database.
During this validation process we are super strict because we do NOT want to take any chances on serving ads to the wrong account and spending ad dollars ineffectively. Therefore, we go through and disable those mismatches manually.
Further, as we re-sync every night, new accounts are being pulled in and this process is happening all over again. The process is ongoing.