If your app has fewer than 10 million users, you have absolutely no reason to not provide white glove customer support to every single user. It literally costs less than $150,000 a year to give 24/7 live chat support.
You will control the narrative and catch any problems before they go to Twitter or the AppStore reviews to complain. They will be utterly shocked when they reach a human, they will love you forever, and do whatever you want after that.
Sure, augment it with AI but make it feel like you’re always there to instantly solve their problems any time of day.