You can bundle /stack offers as follows:
1) If you've a Bank of Ireland debit or credit card, activate the offer by logging at boi.visaoffers.eu. If you've not already done so you can register for the BOI Visa offers here too.
2) Search for a discount code for Snapfish online e.g. here or use one of their website offers - this is an example on snapfishwebsite (6pm, 9th April): up to 50% off Photo Books! use code BOOK420 by 30/4.
3) Once your Snapfishdiscount is applied at the online checkout, pay with your BOI card. Within days your will get money back on your BOI Card