different companies because in different ways where they're each a giant piece of the internet. amazon has shopping, google as search. facebook has social networking. in my eyes the strongest case may be against google where the weakest legal case may be against facebook, but the biggest pr problem. i can't think of any other situation where the co-founder is calling to break up the company. when you look at google, they control search and they've been sued successfully several times in the eu saying they've favored their products in search over rival products. you can look at android and say they favored google apps, apps consumers love like google maps and chrome but they're going to smart phone makers and saying if you want to android operating system you better bundle in our apps, a similar argument that microsoft made back in the '90s