Considering there are over 150,000 people working at Google, I would assume the odds one of them would take a bribe to be pretty good. That said, it certainly doesn't prove this has ever happened.
Maybe all it takes is to know a guy who can complain about the account in the right way that it automatically gets suspended and waiting for a human to take a look takes however many weeks.
Maybe 20k a day is still small fry according to Google. That’s only 7million a year. Apparently Coke has a total marketing budget of 4 billion a year. Couple of the big guys on board and 20k a day is just a rounding error.