Internet access has been one of many, many things the committee has been chasing down. Despite what some people may think, I expect it was not the most important thing. In fact, there were a lot of more important things. I know from my own experience that one of the hard parts about chairing is having to pick between multiple things when you'd like to have them all. You can't always get everything you want. Deal with it, folks! If you need internet access that badly, you can buy it yourself from the hotel or convention center. Would you really be happy to see your membership go up by enough to cover the cost of "free" internet service?
Some things are more important at a Worldcon than free internet service. Holding the Hugo Awards or the Masquerade, for instance.