Just how real is the Net?

[Orion]

@Orion: 'Rules' in the Net depend on the particular virtual hub (think 'web site'). The rules for a teenager's virtual hub could differ from the rules of the official St. Petersburg virtual hub.

So hubs are freely available to anyone? Can every teenager create their own hub if they want? Is it expensive? Is there a limit of hubs a city could have?