Same with discovering that the in-game advertising for RedBull was actually for a real beverage
Then advertisers went bat shit insane
You cant hear about it from David himself in this podcast: "The Making of Earthworm Jim with David Perry - The Retro Hour EP319" https://www.youtube.com/watch?v=UzETRBuzfWY
part about advert gaming is at https://youtu.be/UzETRBuzfWY?t=3820