Where a daily message limit comes from
A daily cap is set by the pricing team, not by the servers. Its job is to make the version that costs nothing worse than the version you pay for, and it is placed at the point where enough people upgrade. Services that sell no plan have no reason to set one.
Running a model does cost money, so a cap sounds like physics. It usually is not. Companies that sell a subscription need the version that costs nothing to run out at some point, because a version that never runs out sells nothing. The number is chosen the way a price is chosen.
On this page
The cap is placed where upgrades happen
A company watches how many messages people send before they stop. The cap goes just below that point, so the people who use the service most meet it and the people who use it lightly never do. Move the cap up and revenue falls; move the cap down and people leave for a competitor. The number that survives is a commercial number, and it moves when the pricing moves, not when the hardware changes.
Hardware sets a different limit, and it looks different
Real capacity limits exist, but they behave in another way. They hit everybody at once, they arrive at busy hours, and they lift when the load drops. A cap that resets at midnight and applies to you alone is not capacity. Capacity does not check who you are; billing does.
The same model often sits behind both plans
People assume the paid plan buys a better model. Often it buys more messages from the same model, plus priority when the servers are busy. That is worth knowing before you upgrade, because the answer you get for money can be the answer you already got for nothing, only more of it.
A service with no paid plan has no lever to pull
If there is nothing to upgrade to, a daily cap serves no purpose. It would cost users and earn nothing. This is why the presence of a paid tier tells you more about the cap than any page describing the cap does. Read the pricing page first and the limits page second.
Fair questions
Do daily caps ever come from real cost?
Cost sets the outer edge of what a service can give away, and the cap usually sits far inside that edge. If cost alone decided it, the cap would move with server load rather than reset on a clock.
Why does my cap seem different from my friend's?
Many services test several caps at once on different groups of people. That is a pricing experiment, and it is another sign that the number is commercial rather than technical.
Does a cap reset at midnight my time?
Usually it resets 24 hours after your first message of the period, not at local midnight. The wording rarely says which one, so the first reset is worth watching.
Open a chat with no daily cap and see how far the conversation goes.
Open unrestricted chat