Streaming services offer cheaper tiers carrying advertising, and the discount is not a concession. For many subscribers the advertising tier earns the service as much as the paid one, sometimes more.
Advertising revenue is calculated per viewer
Advertisers pay for impressions delivered to identified audiences, and streaming inventory is valuable because the audience is measurable in ways broadcast never was. A viewer watching several hours a week generates a meaningful number of impressions.
Multiplied across a month, that revenue can approach or exceed the difference between the tiers. The service therefore loses little and sometimes gains by moving a subscriber down.
Heavy viewers are the most profitable on an advertising tier, which inverts the usual subscription logic where heavy users cost the most to serve.
Cheaper tiers reach a different customer
Some households will not pay the full subscription at any point, and for them the choice is a cheaper tier or nothing at all.
Capturing that group adds subscribers without cannibalising the full-price base, provided the tier is differentiated enough that existing subscribers do not all switch down.
This is why advertising tiers usually carry restrictions on video quality, simultaneous streams or downloads alongside the advertising itself.
Content rights complicate the offering
Not all content can be shown with advertising, because licensing agreements were often written before advertising tiers existed and specify how the material may be presented.
This produces catalogues that differ between tiers on the same service, with certain titles unavailable to advertising subscribers.
Renegotiating those rights takes time and money, so the gaps close slowly and vary by region.
Advertising load is managed carefully
Services limit how many advertisements appear per hour, because tolerance is finite and an excessive load drives cancellations that cost more than the additional revenue.
Placement matters as much as volume, and interruptions are positioned at natural breaks where possible to reduce irritation.
The balance is tested continuously, which is why the experience on a given service changes gradually over time.
Choosing between the tiers
The comparison is the price difference against the value of the time spent watching advertising, which depends entirely on how much a household watches.
Light viewers see few advertisements and save the full difference, making the cheaper tier straightforwardly better for them.
Heavy viewers face the opposite arithmetic, along with the feature restrictions, which is why the tier that suits a household depends on its own habits rather than on which is objectively better.