I've used it in situations where we had demo environments which would automatically reset after a period of time. Using the seeds file was very helpful to reset the data. Sales people would have their own logins which they could give a demo of the application and would perform certain functions like approving timesheets or correct missing IN/OUT punches for employees. They didn't want to prepare new data each time they had a demo for potential clients, so having the seeds generate new data each day/week was a huge timesaver for them.