The paper tallies about $16 million from 1998 to 2005 (8 years) that Exxon spent on its message.
In the same period, the U.S. government spent about $32.2 billion supporting the climate change message. (page 48 here)
As Exxon is accused of, every dollar goes to someone who gets that dollar because they hold a particular position on human-caused climate change.
Manufacturing certainty, if you will. I think it's pretty obvious which side has the bigger fiscal guns.