Publicis Groupe and WPP led the charge in 2018.
Performance mainly down to Mars and Adidas wins for MediaCom and $2 billion GSK account for Publicis.
Mistake reported to have cost Google $10m.
Move has been welcomed by Unilever's Keith Weed, who has led calls for action.
APAC ad revenue grew 4.75% to US$2.41 billion for the quarter, while Apac daily active users increased 2.75% to 561 million.
Jicwebs will adopt Trustworthy Accountability Group's Certified Against Fraud programme from next year.
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