system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can Supermarkets just flat-out rip off a product

Why can I go in and see "Frosted flakes" next the Frosties, yet they don't get sued?

EDIT- I'm not just talking about Frosties, you see it everywhere. If there's a popular product, there will also be a store-brand rip off.
gpt
First, a large portion of store brands are made by the same companies that make the name brand items.  
Second, the only way kellogs could sue over frosties is if they were to emulate trademarked elements of the packaging (ie character, font etc) in a way that creates a substantial similarity which could reasonably cause issues of differentiation by prospective purchasers.....or if kellogs had patented EVERY possible process to flake corn, and coat it in frosting. EVERY possible process...because a very small alteration in equipment and procedure can be sufficient to sidestep a patent.