Fun graphic. Have you seen this one:
http://www.fastcompany.com/1660597/i...about-everyone
As for apps and anything else from iTunes or iBooks, I've spent about $10 total. I use dozens of free apps on iPad and an old iPhone. All the content on my old iPod comes from CDs, Audible or free iTunes downloads. I don't buy iBooks, because I don't want my content tethered to any one company's hardware.