With YourSites you can store all your commercial extension download ids centrally on the YourSites server without the need to configure them on each client site.
If you open the Download Ids tab of the YourSites config you can configure many commonly used extensions straight out of the box.
Even if your extension isn't listed you can add as a custom download ID.
To make it easier to figure out the query key name and value you can usually find these in the list of extensions in YourSites. Hover your mouse over the information icon to see the Download ID information. Note that you will need to check for extensions updates at least once after upgrading to version 1.62.0 of YourSites for this information to be populated.
For example for Akeeba we see
For JCE Pro we see
So for Akeeba you would set the "Download link query key" to dlid and the value to match your download ID. For JCE you would use key and the value to match your download ID
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https://extensions.joomla.org/extension/yoursites-manager/
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