In the settings app they advertise iCloud if you aren't using it
I hate ads, but for most people paying some bucks a month to make sure their 2nd brain of photos/notes/passwords/texts/etc is totally (and now privately) backed up is a worthwhile insurance policy.
I think the argument that advertising iCloud plan upgrades in settings, where you’ll be pointed to if you run out of backup storage, is very benign as far as ads go. Although I do think that they should have a method to dismiss it(I don’t see this so I’m projecting that they don’t).
Windows even sent a notification questioning my choice to disable location tracking.
Unlike MS - you have to link everything with an ID when first setting up W11, no choice unless you go to extreme workarounds. Constant nagging and manipulation thereafter.
With that said, what platform are you using that has no ads at all? Presumably Linux on the desktop, which I can almost use. But unfortunately I can't use it on mobile, I have too many use cases in the personal and business world that require a 'normie' grade phone.