They can absolutely be timebound, unique URL time stamped at the download, with however many number of hours from then to send in whatever you have, completed o

They can absolutely be timebound, unique URL time stamped at the download, with however many number of hours from then to send in whatever you have, completed or not. I've only experienced this once and it was stressful as could be, but was from a person I absolutely respected and still do. No-bs, either right or wrong and plenty to discuss in the followup conversation. Did it from home, pulled the file at around 11pm right when I knew my best time to work was. Would happily do as part of an interview any time.