​A website that will tell you if a generic product is made in the same factory as the Brand name

I was dicking around with some friends coming up with funny business ideas and I thought of this one. Basically you would scan the name brand barcode into the app and it will tell you what other products are made in the same factory. So for example you scan Kellogs Frosted Flakes and it tells you the Great Value Frosted Flakes (Walmart Brand) are made in the same factory in your given region. I’m sure it’s impossible to actually get that information from manufacturers because spilling the beans on that could be catastrophic for brand companies but i still think it’s a cool idea on paper. What do you think? Would you pay say $5/month to use this hypothetical app?