A free newspaper handed out at a station is expensive to print. A search result requires computers, engineers and electricity. A supermarket loyalty card must be built and managed. If a customer pays nothing at the point of use, who covers those costs?
Often a different customer does. In an advertising-supported service, the reader or user attracts an audience that advertisers pay to reach. Economists call this a multi-sided market: the business serves groups whose value to one another is part of the product.¹ A price of zero on one side can be a deliberate way to make the paying side more valuable.
The newspaper test
A free paper can earn from selling advertising next to its journalism. More readers make its space more attractive to advertisers; more advertising can finance wider distribution. The reader receives something real without a subscription, while the advertiser buys an opportunity to be seen. The word “free” correctly describes the cash price to the reader, but not the economics of producing the paper.¹
Search engines and social networks work on a related principle at much larger scale. Search attracts people with a question; social media attracts people with other people. Advertising is sold beside, within or around those experiences. The UK's Competition and Markets Authority has examined how platforms turn audiences gathered through free products into digital advertising revenue.²
Not every free service is funded only by adverts. A basic version may be offered to persuade some people to pay for a premium version. A retailer might discount one item to bring shoppers into a store where they buy others. A charity or public service may be funded by donations or taxes. Zero price tells you how a particular transaction looks; it does not tell you the complete revenue model.
Attention is scarce even when money is not spent
An advertiser wants more than the right to display a message. It wants someone to notice and perhaps act on it. A platform with an advertising model has a reason to keep people engaged, gather evidence of their interests and offer advertisers an effective audience. The business incentive does not mean every design choice is harmful, but it helps explain why a service may keep inviting another scroll or notification.³
There is an opportunity cost. Ten minutes spent on one feed cannot also be spent on another activity. This is not a bill sent to the user, and it should not be converted into an invented cash charge. It is a real trade-off over a limited resource: human attention.
Personal information can make advertising more targeted. Platforms may learn from searches, clicks, viewing habits, location or inferred interests. The US Federal Trade Commission's study of major social-media and video services found extensive collection and monetisation of personal data, while warning about privacy controls.⁴ The practices vary between services, so “you are the product” is a memorable but incomplete slogan. Users receive a service; advertisers buy access to attention; data helps mediate the exchange.
Why getting bigger can make “free” stronger
A social network is more useful if friends and communities are already there. A marketplace attracts buyers when it has sellers, and sellers when it has buyers. These network effects can make a zero price to one group attractive because bringing in more people raises value elsewhere on the platform. The OECD describes both the benefits of these effects and the way they can make digital markets difficult for newcomers to enter.¹,⁵
Consider two new messaging services with identical features. One has all your contacts; the other has none. The first is worth more to you before either charges a penny. That advantage is earned partly by providing a useful network, but it can also make switching costly even if a rival offers better privacy or fewer adverts. The hidden cost may be reduced choice rather than a direct payment.
Free newspapers had network effects of a different kind: a larger readership raised advertising value, but readers did not necessarily need one another to enjoy the paper. Comparing the two shows why “free” is a pricing tactic shared by businesses with very different dynamics.
The money can also circle back to households indirectly. Businesses treat advertising as a cost of winning customers, alongside rent, wages and distribution. Those costs can be reflected in the prices of goods that buyers eventually pay, although the share attributable to any one advert is rarely visible on a receipt. “Someone else pays” therefore does not always mean consumers never fund the system.¹
The loyalty-card bargain
A loyalty scheme may offer lower prices or points in return for registering and using a card. The retailer benefits from repeat custom and information about shopping patterns. The UK's Information Commissioner's Office advises consumers that loyalty cards can gather personal data and that businesses must handle it responsibly.⁶
The bargain is not identical for every shopper. Someone who shops frequently may earn useful savings. Someone who prefers not to register may face a higher shelf price for the same item. The scheme can make discounts more targeted, but it also creates questions about transparency, data retention and whether the advertised “normal” price is a meaningful comparison.
So what is the true price of “free”? Sometimes it is advertising attention; sometimes it is data, reduced privacy, fewer alternatives or cross-subsidy from paying customers. Sometimes the benefit is genuinely valuable enough to make the exchange worthwhile. The useful habit is to identify who pays the provider, what behaviour that payment rewards, and which choices the user gives up or gains. A zero on the price tag is a beginning, not an answer.