JPMorgan Chase has decided to ease the restrictions it placed on customers who used Chase debit cards during the massive credit and debit card security breach at Target stores. Chase customers will now be able to withdraw up to $250 a day in cash and spend up to $1,000 a day on purchases, the company told customers Monday. Previously the limits had been $100 in cash and $300 in purchases. In a letter to customers, Chase said it was making the change after monitoring fraud activity all weekend, and they may continue to change the limits "if we feel it makes sense." Target revealed last week that about 40 million accounts used to pay for purchases at its U.S. stores from Nov. 27 to Dec. 15 "may have been impacted" by the breach.