"That data came to Meta through its Pixel code, which the tax firms installed on their websites to gather information on how to improve their own marketing campaigns. In exchange, Meta was able to access the data to write targeted algorithms for its own users."
Seems that they provided the data to get Meta to target customers for them.
What data did they share, and why did Google or Meta want this data?
Are we only talking Google Analytics or are we talking about for profit data brokering.