It's the country codes for Germany, Austria, and Switzerland (Deutschland for the D, Confederation Helvetica for the CH). Those are the three countries with a majority of their people speaking German other than Liechtenstein, which is extremely small
I think one reason is the large number of German users on the Internet. With around 100 million speakers, German is the second most spoken native language in the West after English.
According to the application texts, many users seem to come from various podcasts. We are also "endorsed" by one of the largest German-language subreddits on its front page (r/ich_iel). Our users have also started to watermark their memes, which occasionally attracts new users. Feddit also made it into an article in a popular IT magazine (heise).
No idea. But they said "German is the second most spoken native language in the West after English" whereas the wikipedia article is on Europe, so that would exclude Latin America if it's part of the west. I believe if they are included, they absolutely dwarf the number of German speakers.
Ohhh that's going to piss off Greek Nazis. The fascist Junta back in the days was all in on "we're western we're the source of everything western we are the west", not to mention "Turks are filthy pigs we have nothing in common with them", meanwhile, the music.
Generally internet culture In the Dach region is very active and forward looking, and potentially ideologically aligned with the idea of Fediverse and generally FOSS software and privacy. E.g. for Wikipedia language share German got overtaken by Spanish only within the last 5 years slipping from 2nd to 3rd suggesting some early adopter and internet participation higher than the norm.
Subjectively a lot of people here have uneasiness with big tech, and are relatively informed about alternatives.DACH on Reddit was also very big, and very ideologically opposed to API changes and general Reddit corpo behaviour. Subjectively again Dach and ich_iel felt like home when I joined, essentially like the Reddit culture I was used to, just with a little more progressive views across the board.
Also I suspect that German language speakers are fairly active within the English speaking parts of the internet in general, while Spanish and French as well as other non Germanic languages seem to have more disdain for English language content and sites, Germans and Dutch as well as Nordics are very comfortable with English as a common language.