Some cultural evolution is quite random and idiosyncratic. The US had a way big photocopied zine subculture in the 90s, and reading these comments I can see a lot of similar patterns of young people mailing and sharing their creations amd expressions. Sometimes a few influential individuals or events can really kick off a wave of cultural innovation, but I also think that the spread of Kinkos in the US during the 90s and them hiring a lot of low-wage kids who would scam copies for their friends and siblings laid the groundwork for zines in the way that Amiga’s market efforts in Europe did for the demoscene.