Is there a limit on how many receipts can be scanned?

Yes. Over a rolling 7 day period, up to 28 receipts can be scanned. If you hit that limit in the 7 day period, you will be able to scan new receipts as the oldest of those 28 receipts fall outside of the 7 day window.

If you reach that limit and are waiting to scan a receipt with a product that qualifies for a special offer which is about to expire, you can still complete that offer when you scan the receipt, as long as the checkout date of the receipt is within the time frame of the offer.