What is the ruling on cash and in-kind prizes offered by some commercial stores with the aim of increasing profit, and is it permissible to frequent these stores?

It is permissible to frequent commercial establishments for a purpose that is Islamically permissible, regardless of whether their prizes are lawful or not, with the caveat that it is not permissible to receive a coupon for participation in prizes according to the view that deems them unlawful.