Mitch Steele. He brewed for Bud for years before becoming the brewmaster of Stone. He would home brew while brewing for AB, and so would his coworkers. So some do it for money, but some brew because it's an opportunity. I would jump at the chance to brew for Budweiser or Coors. You still learn...
My recipe called for 2.5 ounces of one kind of hops, and I had 3 1 ounce bags of those hops, but I added all three ounces. I did an early test and all I tasted was bitterness that was so over powering. Did .5 ounces make a difference?