Many countries believe their law applies extraterritorially. The US Foreign Corrupt Practices Act applies to any company that does any business in the US. A German director of a Canadian company that pays a bribe to an Ethiopian government official can be prosecuted under the FCPA if they set foot in the US. Sweden will prosecute citizens, and I presume residents, who purchase the services of a sex worker abroad. I don’t believe Kim Dotcom ever set foot in the US before the New Zealand government arrested him on foot of a US extradition warrant.