Maybe his ample ego doesn't think a meager $50k (at least by his standards) isn't worth the risk of affecting his first ballot HOF probability.
Now that's how those lies get out. They didn't say it had a wart on it, they said it FELT like it had a wart on it.
Fines in the NFL are actually withheld from paychecks, so Favre doesn't have much of a choice. As long as he still has a game to play, he still has a paycheck due him.
Not to mention the guy has made tens of millions in his career. He'll probably match the 50k to the Wrangler Scholarship fund.