"Oh Cool! Sure, when does it come out?"
-No release date yet.
"Oh....alright well I'm a crazy person, So I am still interested in giving money to this idea. It's definitely coming out, right?"
-No. If 10,000 more people give 5 dollars, it might come out.
"Oh.. that's weird. Well, if it doesn't come out I get my money back, right?"
-Not necessarily. You'll get your money back if they don't get the other 10,000 people.
"Okay, gottcha. So if 10,000 other people pre-order, we all get the game we paid for."
-No. There's no guarantee that they make the game.
"Then I get my money back."
-No. They can just take your money and not make a complete game.
"Okay bye. I'm never coming back to this stupid store again, you guys are straight up trying to steal people's money."