As you recently mentioned, only once the costs of litigation and compensation for lives and health lost exceed the revenues from promoting deleterious foods will the promotion stop.

I quote one of the study’s authors:

First- It is cheaper to “brew” produce sweeteners like xylitol than grow/harvest and isolate natural cane sugar. Xylitol is fermented (bacterial and yeast) from xylose - wood pulp (saw dust).

Second - labeling requirements for GRAS (generally recognized as safe) products are minimal. Terms like "natural sweeteners.", "sugar alcohols." "polyols", and other euphemisms can be used to globally capture a mixture of sugar substitutes/additives like erythritol and xylitol. So they are often added to things we would not even expect as a means to reduce calories (and costs)