Tokelau, a necklace of three isolated atolls strung out across the Pacific, is so remote that it was the last place on Earth to be connected to the telephone—only in 1997.

Just three years later, the islands received a fax with an unlikely business proposal that would change everything.

It was from an early internet entrepreneur from Amsterdam, named Joost Zuurbier. He wanted to manage Tokelau’s country-code top-level domain, or ccTLD—the short string of characters that is tacked onto the end of a URL.

Up until that moment, Tokelau, formally a territory of New Zealand, didn’t even know it had been assigned a ccTLD. “We discovered the .tk,” remembered Aukusitino Vitale, who at the time was general manager of Teletok, Tokelau’s sole telecom operator.

Zuurbier said “that he would pay Tokelau a certain amount of money and that Tokelau would allow the domain for his use,” remembers Vitale. It was all a bit of a surprise—but striking a deal with Zuurbier felt like a win-win for Tokelau, which lacked the resources to run its own domain. In the model pioneered by Zuurbier and his company, now named Freenom, users could register a free domain name for a year, in exchange for having advertisements hosted on their websites. If they wanted to get rid of ads, or to keep their website active in the long term, they could pay a fee.

In the succeeding years, tiny Tokelau became an unlikely internet giant—but not in the way it may have hoped. Until recently, its .tk domain had more users than any other country’s: a staggering 25 million. But there has been and still is only one website actually from Tokelau that is registered with the domain: the page for Teletok. Nearly all the others that have used .tk have been spammers, phishers, and cybercriminals.