[1] https://www.japaniac.de/tokyopops-meistverkaufte-manga-im-ma...
Here is also the top 15 of 2017 for KAZÉ (the covers say it all): https://www.anime2you.de/news/183746/die-top-15-meistverkauf...
[1] https://www.japaniac.de/tokyopops-meistverkaufte-manga-im-ma...
Here is also the top 15 of 2017 for KAZÉ (the covers say it all): https://www.anime2you.de/news/183746/die-top-15-meistverkauf...
How does your source compare with this: https://www.amazon.de/gp/bestsellers/books/698198
The list is about what I'd expect with mostly shounen near the top but there is decent yaoi representation. Not a single what I would consider normal shoujo though.
American: https://www.amazon.com/Best-Sellers-Kindle-Store-Manga/zgbs/...
I would say this more about reflects my guess. 30% for the DE site and 15% for the American one.
I wouldn't necessarily give an Amazon list too much weight. Bookstores here in Germany are everywhere and people like to buy there, especially because you can take a quick look into the manga you are buying. So the lists from publishers tend to be worth more. The good part about the Amazon bestseller list is that it includes Carlsen manga where I couldn't find any info from the publisher regarding sales.
Another publisher I couldn't find anything on is Egmont Manga. The list for spring 2019 says it all though: https://www.egmont-manga.de/fruehjahr-2019/
So no, 30% is definitely wrong.