Cash back rewards may apply to both in-store or online purchases. To see if an offer is eligible for cash back with an online or in-store purchase specifically, you will want to view the offer details. You can find all cash back offer details in the Earn Rewards section of your Betterment account. In-store offers are automatically available by using your Betterment Visa Debit Card at checkout. Online offers must be completed through the Betterment app's Earn Rewards section. To earn cash back, ...