re: Why all the commercial celebrity voice overs when the celebrity isn't revealed?

I saw a celebrity (can't remember which one) talking about this on Late Night. They don't show them because it is a completely different pay structure. For the voice over, the actor shows up-steps in a sound booth and bust out the script in a couple of hours. They pay $30k-50k for top tier guys. To get them on camera, with all the related BS, takes days and they pay 100's of thousands for that. Actors view it as easy pocket cash and the companies get the benefit of hoping you associate the voice with the actor with their product.