That won't make any sense for a gamble who aims for profit if he's going to do that. But you're right, it's a solution for those who can't stand to themselves whether they win or lose because after all, they're about to get addicted from it. And that's why if there are demo accounts that they can gamble with, they should be happy and enjoy with that. Otherwise, they won't consider it as an actual gambling and that's why they don't think it's as fun as real money.