You have the power to control what addon providers that you want to use by disabling them here, they can be re-enabled at any time.
Disabling a provider means that WowUp will no longer check with it during update checks or scanning.
When disabling addon providers you may experience different results, as all providers do not provide the same features. Expect fewer matched results.
This will also change what addons you see in the Get Addons tab.
For best results perform a re-scan after modifying these settings.