Although not entirely the same thing: Google has a semi-monopoly on a lot of things, and they're most certainly a rough net gain for everyone. Standard Oil did

Although not entirely the same thing: Google has a semi-monopoly on a lot of things, and they're most certainly a rough net gain for everyone. Standard Oil did (minus the environment); under their monopoly prices were incredibly cheap. The person who benefited most from the split was Rockefeller, who you've probably heard of.