Memes

To try and answer the question of why so many of them. Please note this is broad generalizations:

1. german people have large privacy and date security fears. This has kept them off of many other platforms. Most people in my friends circle never had a MySpace / Facebook... Being in an anonymous space like here is nice.

2. they also are and have been technologically behind in many ways. Bringing them slower to other platforms that they would have started off on, making it so they didn't use any. Ignorance and fear of technology and privacy fear combined with being technologically slower meant they were going on other platforms in a time when the platforms were getting known as "bad, mentally harmful, data mining & selling machines".

3. English language skills are lower in Germany (outside of Berlin). Many tourists don't see this as they go to touristy things (hotels, attractions) where they speak English. It is easy in platforms like this or reddit to be in a German speaking bubble. People who speak lots of English like their neighbors the Dutch, would more likely just post in English as everyone can then understand it.

Source: my opinions - but I do live in Germany.