I don't understand what you're saying here ... there are many, many national brands of applesauce that consist of just a single ingredient - apples. Santa Cruz is one, as is Cadia, as is the Whole Foods "365" brand ...
I've heard of Whole Foods (aka Whole Paycheck) and was motivated to pull the stats. Some google work indicates Whole Foods gross sales revenue last year was $15B vs the US supermarket chain stores gross sales of $649B. Of course this doesn't count "superstore" concepts like walmarts and targets (and probably others) selling food, nor online or delivery groceries, independents, organic stores, etc etc. So "much more" than 98% of applesauce is not sold at Whole Foods. Assuming that all applesauce sold at whole paycheck is unsweetened, etc. Assuming goods distribution is similar, from my own experience at whole paycheck most people are buying specialty goods like alcohol, meat, produce not bulk processed goods although they do stock them.