DAN SNYDER DOES this thing when he feels cornered, say those who know him well. He paces in a hotel suite, or on his superyacht, or at River View, his $48 million Virginia estate. Cradling a drink in one hand, he tells members of his inner circle about the dirt he has accumulated on fellow owners, coaches, executives, even his own employees — all the stuff he's learned from other sources, including private investigative firms. He never says exactly what he knows, only that in his 23 years as owner of the Washington Commanders, he knows a lot. And that in the zero-sum world of billionaires, this is how you survive. Snyder recently told a close associate that he has gathered enough secrets to «blow up» several NFL owners, the league office and even commissioner Roger Goodell.