I too think link aggregators like Lemmy, Reddit and HackerNews are very popular in Germany, but I don’t know why. The first time I noticed this was during the first two reddit r/place events, where users could compete to claim a pixel on a giant canvas to create pixel artworks. The German artworks were definitely the most prominent ones compared to countries of similar or larger size, by a loooong shot. Broader internet access and an high % of tech-literate population are surely a factor, but it definitely didn’t look proportional