For the proprietary software, a lot of it is front-doors. Literally just pay-to-prey. Government agencies pay the big data companies to access their warehouses of scrapped data that come directly off their clients’ machines through explicit information harvesting protocols.
That said, it is technically harder to have a covert backdoor in an open source system. But it isn’t impossible, or even particularly impractical, so long as the vulnerability remains reasonably obscure. It would be naive to assume your standard array of linux oses are unassailable.
Okay, but these are largely just foods with high salt and sugar content. And high levels of salt/sugar are used for the two-fold benefit of increasing consumption and longer shelf-life.
Nothing in the article, but I’d be willing to bet the same people who eat heavily preserved foods are the ones living in food deserts and other areas that lack affordable fresh produce, adequate kitchen amenities for home cooking, and clean drinking water.
In short - poor people.