1 data center I cannot live without. (well makes my live easier)
I have a problem with the title. out of the 5, only 1 I think I agree with, and that is google. ( although I could probably manage with bing. Although I do use facebook, I sure I can live without it, many of my geek friends manage to survive. I don't use icloud or twitter (although they do have the benefit of keeping the people who do used them away from me.) Which leaves amazon, which is useful, but I could by products elsewhere using google.