It depends on a variety of factors. Availability* Is the code easily accessible to a wider audience? Legacy system cycle* Was the code written in a system that

It depends on a variety of factors. Availability* Is the code easily accessible to a wider audience? Legacy system cycle* Was the code written in a system that is expected to have a long cycle? (20 years+) Attribution* Can it be easily attributed to the owner? Access* Do you have access to enough source codes to confirm it to be true? Quality* Does the code have an appropriate level of quality? Company* Did the company survive the peaks and through of capitalism even if it means being bought out?