Withdrawals should be as frictionless as possible, with severe penalties for unnecessarily prolonged withdrawals. Deposits, meanwhile, should entail much more friction. Some advocates have called for a ban on credit card deposits (already in place in seven states), though evidence from the United Kingdom suggests that this measure does not help problem or at-risk gamblers. More promising would be a limit on the number of deposits a bettor can make within each twenty-four-hour period.
