Citizenship of Saint Kitts and Nevis can be obtained remotely, it is not necessary to come there for this. Citizenship of Saint Kitts and Nevis allows you to enter Schengen countries without a visa for a certain period (for 3 months out of 6) and Great Britain (6 months per year). This is the answer - probably because the citizenship of Saint Kitts and Nevis allows you to enter many countries without a visa. Read more about the citizenship program of Saint Kitts and Nevis in the link https: //www.advokat- kk.ru/2020/01/saint-kitts-and-nevis.html
Pavel Durov did not go there, but simply bought a passport, which gives the right to freely enter many countries of the world without visas. Kitts and Nevis passport is quite convenient and relatively inexpensive when compared with other similar investment passports.
For example, in Cyprus or Malta, a similar passport would cost more - about $ 1,000,000
I suspect that due to the ease of obtaining citizenship, the ability to use a passport to enjoy all the benefits of the EU, and also because Saint Kitts and Nevis is an offshore zone, which, in itself, is very beneficial for entrepreneurs with large capital and profits; )
And, I agree with the answers, he did not go there, as far as I remember.
By the way, it was the state of Saint Kitts and Nevis that initiated business immigration programs back in 1984. There are two ways to "acquire citizenship" of this country: to invest just at least $ 250 thousand in the industrial sector or at least $ 400 thousand in real estate. Why do people do this? Holders of a Saint Kitts and Nevis passport do not need a visa for 140 countries.
Not only this country has programs of this kind: many other states provide for the possibility of obtaining citizenship by persons who invest a certain amount in their economy.
Antigua and Barbuda's conditions are very similar: investors are obliged to give at least $ 200 thousand for charity or to purchase real estate for the amount of $ 400 thousand. As a result: visa-free regime to 115 countries, no taxation of personal income.
Cyprus and Malta also have an illogical programs, but with more stringent conditions. You can read more about this here.
He did not go (there). He just bought their passport. It is not necessary to go there, and indeed, SKN is a small Caribbean island, not very suitable for life. SKN passports are bought in order to travel to the European Union without a visa and receive a preferential visa to the United States, where the holders of these passports are allowed fairly freely. That, in general, is the only reason. It is rather big for a person who wants to travel around the world with a minimum of mental hemorrhoids.