Is it permissible to withdraw from marketing a product that has been agreed upon for a fee, or to replace it with another product? And is this considered a violation of the Jua'la contract, which obliges the completion of the sale after marketing has begun? And is it necessary to ask buyers for their opinion on the product, or is the seller's information and evaluations of other products sufficient?

It is permissible to market products for a known fee, provided that the products are permissible, that there is no deception or misrepresentation in the marketing, and that participation is free.

The marketing contract falls under the category of "Ja'alah" (a contract of reward), which is a permissible contract that can be terminated by either the worker or the one offering the reward. If the worker terminates the contract, he is not entitled to anything. If the one offering the reward terminates the contract after the worker has started, a fair wage for the work done becomes obligatory.

It is permissible to rely on the information written by the product seller, and there is no obligation to ask buyers or look at comments, unless one becomes aware of a defect in the product, in which case it must be disclosed.