All praise is due to Allah, and peace and blessings be upon our master, the Messenger of Allah ﷺ.

If entry into the contest is free of charge, meaning it is not paid for, and a company offers it to a customer so that he may enter a prize draw, then there is no objection or sin in it. In that case, it is considered a gift from the merchant. This is what appears in Iftaa Board Resolution No. 3/2010. And Allah, the Exalted, knows best.