Instagram is the worst offender, I only want to receive message notifications, but I got notifications about inane random stuff I've tried to disable but it won't work. I ended up having to disable notifications altogether.
replyInstagram run their notifications via an auction mechanism (which I suppose makes sense for an advertising company that likely built a lot of RTB systems).
replyI believe the App Store policy is you have to have a setting to disable ads. And Uber actually has it (though it has 8 different channels or so, apparently "Uber teen accounts" marketing was added recently).
replyI used the setting and am not getting Uber ads (only Uber ride notifications).
I would love if Apple enforced that rule, but they certainly don't
reply