Who controls it5 of 11
Who pays for free
If you are not paying for something, someone else is, and they are paying for your attention. That single fact explains most of how these products behave.
How to explain it, by age
Same idea every time. What changes is how much of the machinery a kid can hold, so pick the version that fits and go up a band when it stops being interesting.
Ages 4-6
Use adverts, which she has already noticed and already finds annoying. "The people who made this show get money when you watch the adverts. That is why the adverts are there, and that is why it wants you to keep watching."
Try this
Count the adverts together during something she watches. Then ask who she thinks gets the money. She will work it out, and the counting makes it concrete.
Listen for
Her noticing an advert without being prompted and saying what it is for. Spotting them is the skill at this age.
If she already has more access than most. Point out product placement inside the show itself, which is harder to spot and therefore more interesting.
Ages 7-9
Introduce the exchange. "This app costs a lot of money to run, and it is free for you. So how does it make money? Companies pay to show you adverts. The longer you stay, the more adverts you see, the more money it makes. That is why it is built to be hard to stop."
Try this
Look up together roughly what a large platform earns per user per year. The number is small and the total is enormous. Both halves are instructive.
Listen for
Her connecting the business model to a design feature she has already noticed being annoying. That link is the concept.
If she already has more access than most. Ask why an app would send a notification at a particular time of day, and let her reason it out.
Ages 10-12
Name the arrangement directly. "You are not the customer. Advertisers are the customer. What is being sold is your attention and what is known about you. That is not a conspiracy, it is just the business, and once you know it, every design choice you have wondered about makes sense: autoplay, streaks, infinite scroll, notifications timed for when you are most likely to open them."
Try this
Have her look at the ad settings page of a service she uses, where the inferred interests and categories are listed. Seeing the profile in writing makes it real in a way explanation never does.
Listen for
Her predicting a design feature before finding it, on the basis of the incentive. That is the concept working.
If she already has more access than most. Ask which of the things she likes about an app exist for her benefit and which exist for the advertiser, and note that plenty are genuinely both.
Ages 13+
Extend it to the auction. When a page loads, an automated auction runs in milliseconds in which advertisers bid to reach specifically her, based on a profile assembled from behaviour across many sites. Then ask the harder question, which is what happens when attention is the product and the cheapest way to hold it is outrage.
Try this
Have him install a tracker-blocking extension for a week and look at what it reports. The count of third parties on an ordinary news page is usually the moment this stops being abstract.
Listen for
Him linking the funding model to the character of what circulates, rather than treating them as separate complaints.
If she already has more access than most. Discuss subscription and public funding as alternatives, and what each one changes and fails to change.
The one that makes the others cheap
Once a child knows who is paying, they can work out most of the other concepts on this site for themselves rather than being told.
Why does it autoplay? Because a stopped session earns nothing. Why the streak? Because returning tomorrow is worth more than today. Why does it want the notification permission so badly? Because a session it can restart is worth more than one it cannot.
None of that needs to be memorised once the incentive is understood.
Do not make it a morality tale
The companies are not cartoon villains, and framing them that way is both inaccurate and easy for a teenager to dismiss.
They are organisations responding to the incentives they have. The people building these products are mostly ordinary and many are uneasy about the result. What matters is that the incentive does not point at your child’s interests, and that no amount of good intention inside the company changes the direction the incentive points.
That framing survives contact with a sceptical fifteen-year-old. The villain version does not.
Misconceptions to address
- That free means a gift. It means the cost is being paid elsewhere and by someone with their own reasons.
- That adverts are the only cost. Data collected about you is sold, used to target, and kept far longer than anyone expects.
- That paying removes the problem. Some paid products still harvest data, and some free ones are genuinely funded well. Follow the actual money rather than the price tag.
- Adults often assume the product is the app. In this business model the app is the bait, the audience is the product, and advertisers are the customer.
Running this with a class
Put the running costs on the board: servers, engineers, offices, all of it costing enormous sums, and the price to the user being nothing. Ask the class to work out where the money comes from. They will get there in about four minutes, and having derived it themselves they will not forget it.
The decision this connects to
Last reviewed August 2026