My hypothetical ebay guy says the exact same thing. "If I'm paying for the ad-free experience I want an ad-free experience." Why is he being unreasonable and you're not?
Because eBay doesn't sell an ad-free premium version that removes ads but then still shows me sponsored ads as soon as I click on a listing or a seller's page. Neither does eBay intercept packages after you've made a purchase to drop their own ad flyers inside, or offer a premium tier that does prevent them from inserting an "eBay recommends square space for all your website building needs" flyer, but you end up with a "monkeybusiness78 recommends square space..." flyer in your package anyway
You're correct, they don't. My example was a hypothetical analogy. If they did and you paid for them to stop... would you also expect them to also censor the magazine ads? I don't think you would.