Countries have to be strict on things that are detrimental to their existence. First and foremost they have to be stringent on taxes, but also on money launderi

Countries have to be strict on things that are detrimental to their existence. First and foremost they have to be stringent on taxes, but also on money laundering, gambling and sometimes ideology. A lot of countries maintain small areas where they are more relaxed about these things than in the rest of the territory they de facto control. Sometimes these areas are states in a federal system (Delaware), other times they take the form of special economic zones (Cayman Islands) but in a few cases they form de jure sovereign nations. I think the (more or less) hidden agenda of Liberland is to become the de jure sovereign, de facto tolerated, "special economic zone" of Croatia. When they will have built a hotel, the casino is probably not far and like the other tax haven, money laundering, gambling areas of this world it will be tolerated because it is of mutual benefit to them and their host country. If it pans out: new (de jure) sovereign nation, without a (significant) army.