A plan covering several people almost always costs less per person than separate accounts. The discount is deliberate, and it reflects who those additional members actually are.
The marginal member costs almost nothing
Digital services carry heavy fixed costs in content, engineering and infrastructure, and very low costs per additional user.
Adding a household member consumes a little bandwidth and storage, which is trivial against the fixed base already paid for.
Any revenue above that marginal cost improves the provider's position, which is why the per-person price can fall so far.
Most added members are not lost sales
The people added to a shared plan are usually those who would not have paid full price on their own, such as household members with low usage.
Capturing them at a reduced rate is better than capturing nothing, provided the discount does not pull existing full-price subscribers down with it.
That is the balance every shared tier is trying to strike, and it explains the restrictions attached.
Restrictions protect the individual tier
Household or address requirements, device limits and simultaneous-stream caps all exist to keep the shared plan from replacing separate subscriptions among unrelated people.
Without them, a shared tier becomes the price everyone pays, and the individual tier collapses. Enforcement is what preserves the price ladder.
Enforcement strictness varies by service, and it generally tightens as growth slows and the provider shifts focus to revenue per user.
Retention is the quieter benefit
A plan several people rely on is much harder to cancel, because cancellation affects other members of the household.
That friction shows up as lower churn, and lower churn is worth a great deal on a recurring revenue base.
Providers therefore price shared plans partly as a retention tool rather than purely as an acquisition discount.
What to check before choosing one
Shared plans differ in whether members receive separate profiles, separate recommendations and separate storage, and those differences matter more than the headline price.
Payment sits with one account holder, which concentrates both the billing and the ability to remove members. That arrangement is worth understanding before it becomes contentious.
Where a service enforces a shared address, moving out can end access without notice, which makes the plan less portable than it first appears.
Price increases also land differently on a shared plan, because one raised charge affects several people at once. The account holder absorbs the decision on everyone's behalf, and splitting the cost informally rarely survives a change in the price.