Everyone cooperates because everyone serves their own interest by cooperating. In a world ruled by information and one in which information is old before the ink ever reaches the paper, it becomes an advantage to give access to the information you have rather than run the risk of losing or delaying access to some other bit of data lying around some other corner of the Internet. Within a year the number of 'Hosts' on the Internet doubled. By 1995 the number reaches 4,900,000, by 1996, there are 9,500,000 'Hosts' on the Internet. The Genii is out of the bottle.
Administrators still have control over the hardware resources in their section of the web.
Any of these resources can also unplug itself from the Internet. No one has a claim to those computers and those that own them can do with them as they will. But there is a certain amount of redundancy on the Internet and much of the data lost could be found on some other server. New resources would be brought into play even as new paths were worked out to route that information around the disconnected area. It is in everyone's interest to maintain the Internet and the World Wide Web because it is in everyone's interest that it is maintained.