Alert fatigue. Most people, if they get an alert for every single purchase they make, will learn to ignore the alerts as they are useless 99% of the time. Then when an alert comes through that would be useful, they won't see that either.
Anyone who has had the misfortune to work on monitoring systems knows the very fine line you have to walk when choosing what alerts to send. Too few, or too many, and the system becomes useless.
As I said, I have my alert set to $0 and it really hasn’t caused fatigue. For one thing, when it is something i just purchased, the alert is basically just a confirmation that the purchase went through. I close it immediately and move on.
If I get an alert and I didn’t buy anything, it makes me think about it. Often times it just reminds me of a subscription I have, and I take the moment the think if I still need it or not. If I start feeling like I am getting a lot of that kind of alert, I need to reevaluate the number of subscriptions I have.
If I get an alert and I don’t immediately recognize the source (the alert will say the amount and who it is charged to), it certainly makes me pause and try to figure out what it is, and that has not been “alert fatigued” away from me even after 10+ years of these alerts.
Basically, if I get an alert when I didn’t literally JUST make a purchase, it is worth looking into.
I dont think it causes alert fatigue; I am not getting a bunch of false alerts throughout my day, because I shouldn’t be having random charges appear if I am not actively buying something.