Is it permissible for a company to stipulate that representatives' profits will not be disbursed until they reach 100 dollars, and what if the representative dies or contact with him is lost before this amount is reached, does the amount then become the right of the company?

There is no objection to the company stipulating that it will not send a representative's dues until they reach $100, due to the cost and effort of the transfer. What matters is what is agreed upon in the contract. This does not invalidate the representative's right to dues less than $100; rather, they remain a trust with the company until it sends them to him, or he authorizes someone to collect them, or he comes to take them. In the event of his death, they transfer to his heirs.