If a user makes a purchase without clicking through from ShopBack, we will not be able to trace the shopping session to the user. Hence, no Cashback would be awarded to you if there was no click through from ShopBack.
We are just as sad as you are when you are not awarded the Cashback you deserve!
So always remember to start your shopping session from ShopBack, by clicking on your desired online store from ShopBack's website.