Possibly a mix. The fact that the protocols were free an unencumbered, and reference implementations of both server and client software were provided helped immensely as well. Any idiot could come along and either pick up working pieces or modify them. And they did.

Tim O'Reilly's had a few things to say about watching the Web take off. Its primary competition was closed systems: either entirely closed networks, or proprietary protocols, or both. He wasn't willing to bet his company on any such thing. When the Web emerged, it was clear to him that it was the solution he'd been looking for.