Got a code (have the Brilliant Amex) that I plan to use but got a question. What does ths mean (my bolding)? Why would they add that note about 3 months for the order?

"eGiftCard orders are delivered within 7 business days due to order verification. eGiftCard purchaser should select a delivery date that does not exceed 3 months from the date of order."

How long do I have to use these once purchased? Also, huge THANK YOU to this thread for highlighting to me as I would've missed as well..