Mostly scatter symbols are preferred for this activation, although wild symbols (or a completely different symbol dedicated for this feature) can be used too. To avoid the feeling that the player's money is simply ebbing away (whereas a payout of100 credits on a single line machine would be 100 bets, and the player would feel they had made a substantial win, on a 20 line machine, it would. Most video slot machines have a themed game, some of which feature graphics and music based on popular entertainers, motion pictures or TV programs ( The Addams Family, I Dream of Jeannie, Happy Days, etc.) with a bonus round. Journal of Gambling Studies. Many people may be gambling more than they can afford, and the big payouts also lure unsavory "hyena" types into the gambling halls. Other rules include a 15 coin payout cap, a 50 credit cap on machines, a 3 coin maximum bet, and other such regulations. The cheats give the player an incentive to play the latest games.