In 1984 the year after aspartame's approval for soft drinks, the company that held the exclusive patent on it, sold $600 million worth (1984 dollars) of it.
Myself the truly distasteful part is the use of neotame (a follow-on to aspartame) on animal feed, to get animals to eat feed that they normally would not; for instance, if the feed is rancid or otherwise in a condition/taste that normal animal instincts, would have the animal reject the food...