The Importance of Persuasive Notifications

The UK's competitions and markets authority have looked into this, particularly in terms of booking websites. And they ruled that these practices were misleading and aggressive and unacceptable. But reading the principles closely, it describes how these persuasive notifications are permissible under certain conditions. If it's based on actual data, if it's actually giving users a service, is that arguably a good thing? I think there's a bit of a balancing act of weighing it up.