For connecting yourself to the internet, you're paying your monthly fee (apart from any technical tasks). So do content providers, like Amazon, eBay, and all the web site owners and maintainers whose sites you may visit. Generally, every web site is equally accessible to any user - this is called net neutrality.
Carriers and telephone companies see are fighting this base principle of the Internet and are going to succeed, because

the Justice Department on Thursday said Internet service providers should be allowed to charge a fee for priority Web traffic (AP)

.
If this is going to happen, the Internet will change - and not to its best. Ironically, AT&T and others are using similar arguments to support their position like the opposite party. (Source)