allows you to create promotion that adds products to card, according to the customer's order.
We start from installing an extension:
Then we define promotion. For each 5 2011 Pit Boss products bought:
customer gets 2 free 2011 Tycoon products:
After adding five Pit Boss 2011 products to cart, two free 2011 Tycoon were added too:
After adding ten Pit Boss 2011, Tycoon 2011 count increased to 4:
When adding more products to cart, more free products will be added to order. For each part of products in promotion customer gets free products.