You can buy DealCredits in advance before you use them.
Step 1. Click More.
Step 2. Click Settings.
Step 3. Click Account.
Step 4. Click Purchase DealCredits.
Step 4. Enter the amount.
Step 5. Click "Complete Purchase".
Note: If you are using the IOS version of the app you need to go to DealMachine.com from your Computer or your phone's mobile browser to access the Account option.