article says

"However, our source told us Moz will likely pocket $400m to $450m a year between now and 2023 from the arrangement, citing internal discussions held earlier this year."

so 400-450 million just from google.

per google, in 2018, their entire revenue was only 450 million.

https://www.google.com/search?channel=fs&client=ubuntu&q=moz...

so if they are making more than 50 million from the rest of their country deals, it doesn't seem like revenue would have dropped that much