Interesting. I wonder if the rate at which paper BXP1s are not collected by airport agents has anything to do with it. Presumably making them electronic will reduce the rate of duplicate redemption to zero. And presumably it's hard to police it now (at least in cases where they don't ask you for the serial number, which they didn't ask me last month) because the certs are commonly transferred.

Making them electronic probably has a countervailing effect of decreasing expiration/spoilage significantly, but maybe still better for AA in the end.