I wonder how many email servers are running today? Probably comparable within an order of magnitude. Yet those server are not owned by one corporation, they're multiple corporations cooperating to move data between each other.

It's too bad Facebook and Twitter are businesses, instead of multiple protocols and multiple businesses. Or in other words, it's too bad The Old Ones didn't think cat pictures and what they had for breakfast was important. https://en.wikipedia.org/wiki/List_of_Internet_pioneers

EDIT: Changed to intended link.