You must be a Duda reseller and have access to the Widget Builder on your dashboard, and give us access to it in order to add these widgets to your account. Widgets are available across your whole account, on any website, and as many times as you desire (with the exception of Duda API). All widgets are sold as-is, any extra features or functionalities can be added for an additional development cost, just let us know! Be sure to check out our widget demo to try out how all of our widgets work.