I do not think that the signature company is financially interesting for the beginner. It is better to use all the forces to raise your level, social programs and other proposals of bounty managers.
Even a beginner has the right to participate in the signature company, if it is in the company's baudy environment. This is experience, this is the operating time, this is a possible small profit.
the most important thing is do not expect too much for the project that is followed because if it fails then it will make the mental drop. For beginners, just take this as learning before getting into a real project. so I think it's important for beginners to take part in the project because this will make them gain experience and knowledge.