Events and tournaments that are unique. For example, certain online casinos may hold special slot tournaments in which only players with promo codes can vie for larbingo casino slotsge cash payouts or opulent benefits. In addition to offering the chance to win large sums of money, these kinds of events help participants feel more connected to one another. Promotions for Loyal Players Continue. For devoted players who regularly use their promo codes, a lot of online casinos also provide ongoing promotions.