North American revenue includes US, Mexico and Canada. The lawsuit is only about US households.
Also, while technically correct that what is included in “how much people in North America spend at Amazon”. The lawsuit is about online sales. Whole Foods by itself made $150 billion in revenue which comes under North American sales.
And if you actually read the report you would see where he is still wrong.
Hint: there is more to “North America” than just the US.