Smart Campaign funding explained

If your Smart Campaign runs out of funds, all pending gifts will go out when your account is funded again

Any pending gifts in your Smart Campaign will be sent once your account is funded. If you would like to pause your Smart Campaign and save your deposited funds, simply deactivate it. 

Deactivating a smart campaign:

To ensure there is no interruption to your automated gifting, please be sure to fund your account with the appropriate amount to cover each month's gifts.