Taking commission from websites in return for promoting the products they sell
Question

                What is the ruling on the commission that I get from websites for the promotion I do to sell their products? Basically the idea is that I convince the customer to buy a specific product, whether it is books or medicine or computer products, etc, and I recommend him to buy from a particular website, and this website gives me a commission if the customers buy from them. What is the ruling on taking this commission? Is this commission permissible?.
Praise be to Allah.
    It is permissible to take commission in return for attracting 
    customers and encouraging them to buy particular products, so long as the 
    product is permissible, the commission does not add so much to the price of 
    the product that it is damaging to the purchaser, and you try to be honest 
    in telling the customer about the product. Taking commission on this basis 
    comes under the same heading as brokerage. 

    It says in Fataawa al-Lajnah al-Daa’imah (13/131): It 
    is permissible for the broker to take a known percentage of the price that 
    is agreed to in return for showing it to him, and he may take it from the 
    seller or the buyer, according to whatever has been agreed, on a fair basis. 
    End 
    quote.                                                                       
    

    It also says (13/130):

    I took a customer to a factory or store to buy something, and 
    the owner of the factory or store gave me commission for bringing the 
    customer. Is this money (the commission) halaal? If the owner of the factory 
    adds a particular amount of money for each item the customer takes, and I 
    take this money in return for the customer buying this product, is this 
    permissible? If it is not permissible, what is the kind of commission that 
    is permissible? 

    Answer: If the manufacturer or trader gives you some money 
    for every item that is sold through you, to encourage you to continue to 
    look for customers, and this money does not increase the price of the 
    product and that does not cause any harm to others who sell this product, 
    meaning that this manufacturer or trader sells it for a price like that for 
    which it is sold by others – that this is permissible and there are no 
    reservations concerning it. 

    But if this money that you take from the owner of the factory 
    or store increases the price of the product paid by the purchaser, then this 
    is not permissible for you to take it and it is not permissible for the 
    seller to do that, because this is harming the purchaser by increasing the 
    price for him. End quote. 

    What we have mentioned as being permissible is just telling 
    people about a particular product, without that being accompanied by what is 
    called pyramid or network marketing, because that is a haraam kind of 
    marketing, as is explained in the answer to question no.
    42579. 

    And Allah knows best.