Well, my ignorance in confusing "corn syrup" with its evil twin "high fructose corn syrup" is likely shared by many. Bud Light took a double risk: one, they took on competitors directly (at all); two, they did so with a half-truth. Let's start with the half-truth and then I've got a theory as to why Bud Light decided to take these risks right now. Not to mention the fact that corn syrup is straight glucose while high-fructose corn syrup is only about 45% glucose; hence, the bad rap for high-fructose corn syrup. And now that Bud Light has called out Coors Light and Miller Lite, the gloves are likely off.
Source: Forbes February 25, 2019 21:59 UTC