Sure, you can download it for free, but at $20 its a good way to support the spread of Ubuntu/Linux/Open Source in more mainstream ways.
Do you get anything with it? I remember buying a copy of Red Hat at Costco when I was in grade nine just for the massive manual it came with. It kept me company on the toilet for years. I still have it (and a bunch of old ST/TOS manuals) in my current washroom. It’d be nice to have a modern version.
Unfortunately, it just comes with one cd and a tiny thin booklet. Pretty much just the basics so grandma could boot from a disc.