As of October 22, 2018 the Google Ads policy was updated with additional requirements for advertisers using Customer Match to show sufficiently established Google Ads account history.
To learn more,
https://support.google.com/adspolicy/answer/6299717
To view the Customer Match policy,
https://support.google.com/adspolicy/answer/6299717
To learn how to apply for verification,
https://support.google.com/adspolicy/answer/9002729