system
A chat on subreddit /r/wallstreetbets
human
I have no idea what you mean by 'gift card industry', but yes different companies will have different breakage amounts.  What is remarkable is the number of people who lose their gift cards - treat them the same as you would cash.

gpt
When I say 'the gift card industry' I mean Blackhawk Network, who underwrites and manages the payment of ~18000 retailers gift cards. They (allegedly) have aggregate breakage of around nine percent.