Why is ebook required through registration and print is separate?

I’m trying to register for L3 and I noticed that the ebook comes with registration and the print has to be purchased separately. Why is it like that? I don’t really use the ebook so it comes at little help for me. I like a print version so I can take notes in the borders and highlight important lines.

Please share your thoughts.

there was thread where one could bypass this ebook thing and buy only printed book.

where? I dont see it