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How can I contribute Add-on?How can I use "Commercial Vaadin Add-on Licence v3" with this Add-on?Any rules to follow?
This page contains good information on publishing add-ons: https://vaadin.com/directory/help/creating-vaadin-add-ons#publishing-an-addon
And https://vaadin.com/terms-of-service lists rules and the possible licenses you can have (open-source). CVALv3 is not possible.