Superbowl Commercials

Some say they tune in to the Superbowl for the commercials as much as for the game itself.  I'll admit, these commercials are normally a step above average.  Stars are lining up to perform for these commercials because the whole world is watching, so why are sponsors leaking these spots to the internet before the game?  Now I have no reason to watch them.  I've already seen Matthew Broderick as Ferris Bueller, Jerry Seinfeld, Jay Leno, and Elton John plays a King in an imaginary Kingdom.  I guess I'll have time to go to the fridge afterall.  I think Elton is jealous of Madonna, and secretly wishes he was performing at halftime;http://myfm1065.com/news/articles/2012/jan/30/elton-john-talks-super-bowl-commercial-picks-tells-madonna-make-sure-you-lip-sync-good/