"Which of the two fatwas should we rely on regarding the issue of gifts in exchange for a known price and for the same price? And why is there a contradiction between fatwa no. 31906, which inclines towards considering it a sale, and fatwa no. 32169, which prohibits it?"

There is no contradiction between Fatwas 31906 and 32169 regarding incentive gifts and raffles. Fatwa 32169 prohibits the transaction if the primary intention of the buyer is to enter the raffle, not the commodity itself, which makes it forbidden. As for Fatwa 31906, it adopted a detailed approach and the principle of permissibility for the transaction in general, while pointing out the prohibited scenario, which is intending only the raffle. So, if the buyer's intention is merely to enter the raffle, the transaction is forbidden for him and for the seller if he knows his intention. However, selling it to the general public is not prohibited.