If someone has evidence of a D & G connection and is willing to sell it, how do you think he should do it?

It depends what they want. I’m convinced it happened before and people went to tabloids to make money but David and Gillian took it down by paying more money. That’s just a theory, but I think that’s what happened circa 2012.
If you want the truth to burst more than you want money, just release the shit out of it on the social media of your choice!