If you look at the source (arton Capital) their business is "high net worth investors" - so this list is for their high net worth clients to choose which country they want to invest in.
Part of it is them selling support and work on changing citizenship through money. The very rich do not have allegiance to a nation, only to themselves.
Sorry my "invest in" was supposed to be in air quotes - too late to edit. This is exactly what they want. However they're less concerned about actusl citizenship and more with the benefits (tax status, access to countries/properties)