I put a great amount of effort into purchasing products without specific ingredients for the allergy concerns of my family. One of those is High Fructose Corn Syrup. I had finally found a brand of BBQ sauce that was HFCS free, and used it for quite a long time. One day I became curious if the ingredients had changed, and sure enough, the company had started using HFCS at home point.
Tracking these sorts of changes of course requires a great amount of crowd-sourcing effort, but I believe that it's worth so much more than the effort put in. In my case, it was just HFCS, and not much of a problem. But had it been one of the allergens that we have to avoid, that would have caused a much bigger problem.
Great work, keep it up! I look forward to contributing.