Google is rolling out its age assurance technology that uses AI in Canada.
Essentially, the technology uses machine learning to interpret “a variety of signals already associated with the users account, such as the types of information a user has searched for or the categories of videos they’ve watched on YouTube,” in order to determine a user’s age.
Attached debit card would be a bad measure, as there’s a lot of parents who would give their kids their card info to save.
Account age should most definitely be the first measurement, followed by activity(time of day and type of content).
Either way, you shouldn’t have to tell anyone how old you are to use your device.