Here (EU country) the same sweeteners that are used in diet soda is found to replace up to half the sugar in some common non-diet sodas, to reduce costs. Becaus

Here (EU country) the same sweeteners that are used in diet soda is found to replace up to half the sugar in some common non-diet sodas, to reduce costs. Because while its not much, it's a lot more than the cost of water+sweetener. This has been an unpleasant surprise to people whose stomachs don't like the sweetener and who didn't notice the changed recipe on the label...