Shipping software with a printed manual is archaic and a waste of money and resources. If you need a hard copy, have a print shop make one for you from the PDF.
Steinberg does;t need to supply you with a voucher. They have more important things (like new features) to worry about.
Steinberg was one of the first music software companies to stop shipping manuals. Personally, I thought it was pretty smart. I prefer to have the ability to search a PDF with key terms. Shoot me if I ever have to use an index or table of contents again.