They will do anything to get users to come and play in the hope of winning, because they played on a demo account and won. Even though it's not the same, because in real account games they have a smaller chance of winning.
But in reality there are still many people who think so, it means that what casinos do with their demo accounts manages to form the wrong mindset of many users, especially those who are gambling for the first time.
The only thing that triggers you to play is that on the time that you would really be doing demo is that you could potentially win up big because you do have that kind of confidence on playing up like a mad man since you know that you cant lose up something which it would really be that a totally different story when using up that real money on which experience would be different.
Demo is really just that for the sake of testing out the game and if you won then dont expect that you would really be able to experience when you do play on real balance.
Yes, this is something that could trigger out that kind of impulsive approach towards it.
Having self-confidence is not a problem, as long as that self-confidence is not excessive. I also sometimes say before playing that I will win this time, even though I lose as a result. And in my opinion, that is still within reasonable limits, because who doesn't want to win when gambling.
However, when we have excessive self-confidence, we may do something we shouldn't do. For example, continuously making deposits and hoping that the winnings will come to us.