Many reasons, at big companies employees require a lot of red tape so it's a way around it, you may need a specific skill set for a short period of time, or jus

Many reasons, at big companies employees require a lot of red tape so it's a way around it, you may need a specific skill set for a short period of time, or just a large volume of work to get done at peak. If they're good, the person may not want to be an employee, I see that all the time.