Global randomness as the main promise
Unlike chats targeted by country or language, the international chatroulette has no geographic restrictions at all: every click could connect you with someone in Japan, Brazil, South Africa, or Norway. That total unpredictability is exactly what appeals to fans of pure discovery, curious to stumble onto cultures they'd never have otherwise explored. It's the format closest to the original spirit of the chatroulette concept: a truly random meeting between strangers from every corner of the globe, with no filters or pre-selection.