Condition/Block an offer to be purchased
If you want to set a condition for a purchase, such as requiring a customer to have previously purchased another product or offer, follow these steps. By default, offers do not have any conditions.
Go to the edit view of your offer.
Click on the Blocks menu.
Click on the plus button.
Select the block type to add an offer or product, then select the offer or product.
Click on Save.
You can also remove a previously added block by clicking the X icon.
As you can appreciate in the alert message on the top of the index view, the customer only needs to have at least a purchase of one of the items listed.