What does Lin Wood have to gain for his revelations about John Roberts, Kappiy Isaac, the Lizard Group, and accusations of a blackmail network?
Is he running for office? No.
Will this increase his book sales? No.
Will it get people to tune into his next news or TV show? None.
Will it give him a good reputation? Not so far.
The motive might be the best one: Doing what is right at great cost to oneself.