>>21481898people most definitely eat cocoa pebbles lol. give it up, man. I'm sorry but you have not uncovered some grand conspiracy by observing the cereal aisle. you're not the main character of a thriller movie. grocery stores use algorithms to analyze data on what's selling, and if something isn't selling well, they put it on discount to get rid of inventory and stop stocking it. grocery profit margins are thin as it is, they take inventory seriously and a lot of work goes into determining supply and demand. some products are definitely more niche than others, but are often shelf stable and produced by companies who make a lot of other products, so it evens out. it's not like giardiniera is being made by some company that exclusively produces giardiniera. Mezzetta is a large company that produces a wide range of pickles, olives and sauces. it probably costs them next to nothing to produce giardiniera and ship it with their other products, so even if it doesn't sell as well as their olives for example, it's still worthwhile for them.
anyway, there are a lot of fucking people in the world with diverse eating habits, and you live in a bubble.