I imagine that PocketBook is trying to offer a bookshop where you can buy their books and download them directly to your e-readers. This is useful for those who want precisely that. For other users, PocketBook continues to offer its open system. Buy your books wherever you want and send them to your e-reader through their different channels (PocketBook Cloud, Send to PocketBook or via USB).
In Spain, PocketBook has long been associated with one of its main bookshops (Casa del Libro), but Adobe DRM is used here. Of course, you can also read books with LCP DRM.
https://pocketbook.es/noticias/liber...s-sin-barreras
(This is how the English shop looks on my PocketBook e-reader...)