Why does Upromise transfer rewards to linked accounts via ACH?

Upromise will automatically transfer your Earned Rewards into a linked 529 College Savings Plan account or a linked checking/savings account via ACH (Automated Clearing House) monthly, generally in the first week of each month, provided that you have met your minimum transfer requirement.  Direct transfers have replaced paper checks because they are more secure, environmentally friendly, grant access to funds faster and eliminate the risk of checks becoming lost, forgotten or stolen.