Ezoic
When you change your Name Servers to point at Ezoic, a small number of users will start seeing the optimized versions of your site right away. However, because various Internet Service Providers (ISPs), and even your own computer or home router, can cache name servers, it can take up to 24 hours before everyone is redirected.
This means that you might not be able to see the optimized versions until roughly 24 hours after you make the change.