Is it permissible to take a commission from a foreign factory for bringing a customer to it, knowing that the factory might increase the price for the customer to cover the commission?

It is permissible for a Muslim to take a commission from a factory for bringing in a customer, and this is considered a brokerage fee, meaning mediating between the seller and the buyer. The evidence for its permissibility is the Almighty’s saying: "And for him who brings it is a camel's load, and I guarantee it." The factory's raising the price of the product for the customer due to the broker's commission does not cause harm, because the sale is based on mutual consent.