system
Given the following post, respond as if you're commenting on Reddit:
human
[Ready Player One]Why doesn't the Oasis have competitors?
gpt
Presumably, a lot of Halliday's tech was proprietary; he would have needed to solve a lot of issues just to build the underlying infrastructure for the Oasis, to say nothing of the core software itself. By the time the fundamental patents for the Oasis finally expired, the Oasis had achieved a stranglehold. Everyone who might have the resources to build a counter-Oasis could make money faster and easier by working within the system instead of trying to re-invent the wheel. 

>! That said, with the recent changes to the Oasis' operating schedule, one could emerge. People are going to want something to do on Tuesdays and Thursdays, and going outside isn't going to be a very popular option, considering what outside looks like. In essence, Wade & Co. have just hand-built a market niche for the system that may unseat the virtual dominance of the Oasis.