https://www.devex.com/people/can-you-get-a-refund-through-copyright-2291257
https://www.devex.com/people/what-is-the-refundable-option-on-copyright-2291299
https://hackmd.io/@ridakhan/BkwQXTiSyl
https://hackmd.io/@ridakhan/BJeXV6oSyx https://www.devex.com/people/does-copyright-free-cancellation-mean-full-refund-2289584