I only care about the helpful notifications, not the promotional ones
My rule is: if I get a single notification that I find useless, I'll immediately disable that notification channel (I'm on Android; I'm not sure if iOS has a concept of channel-specific settings) for that app. Even if the channel can include useful notifications, as the article discusses.If the app doesn't bother to categorize its notifications into channels at all, I turn off its notifications entirely, and I won't turn it back on.If something is important enough, I can always manually check on it. My attention is too valuable to me to waste it on useless notifications.I do want more control over my notifications in general. I use Google Apps Script to automatically process/triage my email, and I want to do something similar with notifications. I can probably do so using Tasker, but I haven't gotten around to it.