Amazon Gift Cards

I don’t understand why this is the case:

  1. If my status is ONLINE, I will send the code in 15 mins, sometime up to 30 mins.
  2. If my status is not ONLINE, please leave an message and wait for few hours.
    :bangbang: PLEASE RESPOND QUICKLY !!
  3. Gift code cant be stored , need to redeem instantly after you get it.

What makes these “code cannot be stored and need to be redeemed instantly” ? Very very odd… I have never heard of a gift card company that needs you to redeem a gift code instantly…