Peter s,
It's not my place, nor yours, to answer the question why someone won't step up and take the challenge. Actually, that's not even the question. Randi is baiting Dave Clark and John Atkinson, not you or me, or any A-Gon member. We've got nothing to lose. And on the 50/50 outside chance we could actually tell the Monster Cable from the Pear Audio...who freaking cares? Randi just wants to embarrass these two hotshots, not schmoes like us. Wisely, these guys aren't going to risk their reputation--and careers--to let Randi make saps out of them.
But feel free to call him and try to win the $1,000,000.