Is it permissible to purchase products from multi-level marketing companies for personal use and for family and friends at the purchase price, without the intention of selling to obtain a commission, provided one registers under a previous member and pays a symbolic one-time fee, especially if the desired products are only available through this method, and does this encourage the forbidden marketing?

Purchasing permissible goods from this company is permissible as long as the company does not stipulate that the participant must engage in network marketing in exchange for exemption from or reduction of shipping costs. If it does stipulate that, then it is not permissible to benefit from this exemption or reduction. However, if it does not stipulate that and the purchase is for personal need, then there is no objection.