From what I see, typically, open source developers has excellent communication, judgment, and problem-solving skills. They also keep up with the tech trends. They loves open source software and wants to contribute as a full-time, but the company wants to use their skills to other roles.
The solution to keep the dream of doing OSS freely, is creating own company. However unfortunately, the only weakness of them is lack of business mind/talent. Hence, many open source developers who has long hair and shaggy beard like garage rockers, are always hungry.