Text is a rather small part of web traffic. Most bandwidth nowadays is used to deliver multimedia content (music and movies), much of it in real time.
Several people have written articles about how the Internet has been and is being changed to work as a more efficient video distribution network, which is a long way from the original idea.....
Some of that is paid for by subscriptions (eg Netflix, Spotify) though I assume the vast majority is -- like most radio and television -- paid for by advertising.
