When I was younger, out of curiosity I've downloaded leaked source code of Windows or video games.
Got an impression that code is not that useful to an outsider. It can help answering extremely specific questions how a particular small isolated function is implemented. Even ignoring legal issues, it won't significantly help building competing products, let alone building a successful business around such product.
When we hire people, they gain access to complete source code, documentation, continuous integration environment, bug tracker, and most importantly to the current developers. It usually takes them months to become productive. With just the source code, would probably take a year even for very smart person.
Got an impression that code is not that useful to an outsider. It can help answering extremely specific questions how a particular small isolated function is implemented. Even ignoring legal issues, it won't significantly help building competing products, let alone building a successful business around such product.
When we hire people, they gain access to complete source code, documentation, continuous integration environment, bug tracker, and most importantly to the current developers. It usually takes them months to become productive. With just the source code, would probably take a year even for very smart person.