For getting more results from Moz and improving performance, you should get your own API credentials from Moz and add them to your request. Once you have the credentials, you use them by adding "APIKEY_X&Y" (where X=Access ID and Y=Secret key) to Options: Advanced settings on the add-on sidebar, or to the Settings column in SupermetricsQueries. With this setting, Moz queries will be done using your own API credentials.