There are people who play games without money, but that is not gambling of course.
This is often called demo mode and can be used to test a game, the results are different if using real money.
Demo mode is good to test out games to see if you like it but not more than that. I used to play in demo mode on slots quite a lot and I always got (very) big wins. Most often, after a big win, I tested out the slot in real mode but never could win anything good lol
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