Use Promotions Often Casinos know that if they can get people started playing slots that many of the gamblers are going to play more in the future. So many casinos run promotions to entice gamblers to try their slot machines. Online casinos offer free spins, no deposit bonuses, ทางเข้าpg and deposit bonuses to get more gamblers to try their slot machines. Land based casinos sometimes offer free slots play and comps to get players to try their slot machines.