Not sure why the hullabaloo over Beck and Goldline. In the old days radio broadcasts were always sponsored by various products and the actors endorsed the products that sponsored the shows they played on. Even now, radio personalities locally will spit out some bull shit endorsement about "my new AT&T cell phone" or "I tried <insert sponsor name here> just the other day and was amazed at the performance of the <insert product here>, I really recommend you (the audience) check out <sponsor name> when you get the chance! And now back to our music...."
Beck is just the actor that is endorsing his sponsor. There are always going to be dumbasses that are going to take the actor for their word as an expert on that product. But they aren't... they're just some schmo paid to pitch a product. Nothing more.