Think embedded advertising was invented by Hollywood or network television? Check out these great single-page comic-book "adventuretisements" from the early days of color comics. (Of course, the practice goes back much further than that! Radio, medicine shows... modern advertising can seem a lot less shocking when you remember its roots.)
See! Sam Spade save himself by using Wildroot Cream-Oil Hair Tonic!
Watch! Little Jim stare down a gorilla thanks to the gun he earned by selling White Cloverine Brand Salve!