Who decided you cannot use it
A service is unavailable because the company chose not to launch there, because a law makes it expensive, because a payment or age rule cannot be met, or because the country blocks it. The first 3 are the company's decisions and they are far more common than the fourth.
Being told a service is unavailable in your region reads like censorship. Usually it is a business decision, and the difference matters because the 4 causes behave differently over time.
The company did not launch there
Every market costs something to enter: translation, support, legal review, tax registration. A company launches where the return justifies that and adds countries as it grows. Most unavailability is this, and it is the version most likely to change on its own.
A law makes it expensive
Data residency, age verification, content liability: rules that are workable for a large company and prohibitive for a small company. The service is not banned; complying costs more than the market returns. This is why smaller services have narrower footprints than large ones in exactly the same category.
A payment or verification rule cannot be met
Where a service requires a card or an identity check, countries without the relevant infrastructure fall out automatically. Nobody decided to exclude them; the sign-up simply cannot complete. A service with no account and no payment has none of this.
The country blocks it
The fourth case, and it looks different from the outside: the page does not load at all rather than loading and refusing you. Distinguishing the 2 takes a moment and it determines whether anything on the service's side could help.
Straight answers
Does availability change?
Frequently, in both directions. A service can add a country as it grows and drop one after a legal change.
Why does a free service restrict countries?
Legal exposure applies whether or not money changes hands. Free removes the payment problem and not the liability problem.
Can I ask a service to add my country?
It costs nothing to ask and it rarely moves anything on its own. Demand is measured in traffic rather than in messages.
Open a chat that runs no country check at all.
Open unblocked chat