You quickly load up pages, that's true, but as much as the writer rules the show, content is still king. That means things like podcasts, streaming video, hangouts, VOIP, Live Tweeting, and other activities that take up more bandwidth than loading a page. If your video or podcast takes a few seconds longer to load, or doesn't buffer fast enough to provide a smooth experience, then as a content creator you're going to have a very hard time holding on to an audience.
The technology side of it has to do with peering networks. Before I get into this: I AM NOT AN EXPERT. If someone with a more technical background can explain this, please do. But here's my layman explanation:
When you connect to a page or address, you're going through a series of connections to do so. Now, if you want a page or piece of content to load quickly, it takes the shortest path to do so, jumping from one DNS server to the next, and then delivering your request back to your computer. Think of it like calling up the operator in the old old days and they connect your call at a switchboard. It's pretty similar to that.
Let's theorize that, on a fast lane connection, a request you make from your home in New York goes to a local DNS server which communicates with another DNS server, say in Los Angeles. This communication happens over a network of data hubs. The fast lane connection takes the shortest number of hubs to deliver the data back to you. That means you start streaming faster, get a page request back faster, etc.
On a slow lane request, that same request gets routed through more and more hubs. It would be like your call from New York to Los Angles was routed through Miami to Salt Lake to Denver and then to Los Angeles. Now, this may not be a massive drop in speed, but if you're requesting a large amount of data, you will notice it in the time it takes for a video to load, or the speed at which it can be streamed to you. Enough delays, and you're likely going to hit the back button or search for another source.
By making sure that these networks treat all request exactly the same (whether they're from Netflix, NBC, or little old me) it allows businesses to reach customers more smoothly.
As far as corporations making money... they already are. Broadband internet has been shown to have a 90%+ magin for service providers. This is not a question of poor put upon service providers looking for a way to monetize... it's about greed, pure and simple. http://lmgtfy.com/?q=broadband+internet+margins