This is not my particular case, but for someone at 500 coins, he'd need to toss in 70$; that's more than my monthly income. Not very easy to simply toss at the screen.
Well, every withdrawal is charged 200 coins by fizzer and withdrawal that reduce your account below 1000 coins is charged another 600 coins. That means(in case of lifting 7500 threshold) withdrawal of all 500 coins would force someone to pay 3$ to Fizzer :D