Streaming and software services increasingly offer a reduced price in exchange for advertising. The price gap between the tiers is a direct statement of expected advertising revenue.
The gap is a revenue estimate
If a service charges less for the ad-supported plan, it must expect to earn at least that difference from advertising to avoid losing money on the switch.
That expectation is built from an assumed number of viewing hours, an assumed ad load per hour, and an assumed rate advertisers will pay per thousand impressions.
Where the gap is wide, the service is confident about all three. Where it is narrow, the ad tier is functioning more as a price ladder than as an advertising business.
Heavy users are worth more on the ad tier
A subscription charges the same whether someone watches an hour a month or every evening. Advertising revenue scales with consumption instead of being fixed.
That inverts the usual economics. On a flat plan the heaviest users cost the most in content licensing and bandwidth, while on an ad plan they generate the most revenue.
Services therefore have an incentive to move high-consumption households onto ad tiers and to keep light users on flat plans, which shapes how the options are presented.
Targeting data raises the rate
Advertising sold with detailed audience information commands higher prices than untargeted inventory, so the value of an ad-supported viewer depends on what the service knows about them.
This is why ad tiers usually come with expanded data collection terms, and why sign-up flows on those plans ask for information the paid tier does not require.
State privacy laws in the US give residents varying rights to opt out of certain data sharing, and exercising them can reduce the value of that inventory to the service.
Content rights are not identical across tiers
Licensing agreements are frequently written per distribution model, and a rights holder may permit subscription streaming while restricting advertising-supported streaming of the same title.
The consequence is that ad tiers sometimes carry a smaller catalog, with specific titles unavailable rather than merely interrupted.
Features can differ too. Download capability, simultaneous streams and maximum resolution are often set differently, because each affects either cost or the ability to serve ads.
Ad load tends to increase after launch
Services usually launch an ad tier with a light interruption load to make the trade acceptable, then raise it as the subscriber base becomes established.
Since the ad tier price is fixed while revenue per subscriber can be raised by adding inventory, the pressure runs in one direction over time.
Comparing tiers at sign-up therefore compares a launch condition against a mature one, and the sensible expectation is that the interruption level will drift upward.