There are good and valid reasons to ask for age and I would argue legal is one of those types of reasons.

    “Comply with age-related legal obligations

However, delivering ads is not something I would be willing to accept. Drop the lines below Disney and I might consider thinking about talking with wife about approaching trial run:

    “Personalize your content and experiences
    “Deliver targeted advertising to you”

<< age doesn't exact ring alarm bells for me here.

Not everyone is ok with being profiled from every possible angle.