In the world of Ready Player One, it was a terrible idea because most of the economic activity of that world passes through their servers. Stopping most economic transactions one day a week is maybe a little bit much.
In the idiotic world of Ready Player One, the Jesus Gamer said that all kids would get five days of virtual school a week and then a minute later said that the entire system would be shut down for one of those days.
Here, it's a much better idea.