Then you can give us some proof/citation on "They had many options for evading DRM" please?

Every time I've borrowed a book on there, it's used Adobe DRM just like when I buy an ebook.

Those options don't exist for books in their lending programme though.

Example: https://archive.org/details/introducingpytho0000luba

I have seen it many times. Perhaps they removed it since the lawsuit.

I have too: on books that are not part of their controlled lending programme.