What is the ruling on dealing with "Gold Mine International," a company that sells products such as gold bars, watches, and gold-plated pens, and adopts a binary tree network marketing system where the customer receives a commission for promoting the company's products, with a maximum limit for commissions and consideration for the balance of the "tree"?

Network marketing that requires the purchase of a commodity or product is impermissible, as it may lead to gambling. The incentive for purchasing is the hope of profit, and the participant may either gain or lose. The ruling is based on what is predominant, and the Permanent Committee for Scholarly Research and Ifta has issued a fatwa prohibiting and forbidding this type of marketing.