I wonder if it is only in certain parts of the country — or whether AP is simply foaming at the mouth.
Has happened to me here in E TX with Visa debit. Seventy
five and auto shut off. I had no idea why, now I know.
I actually know the answer to this one. Credit card fraud is really common at gas stations. The first thing homey does when he steals a credit card is take his five friends to the gas station and fill up. Bad guys know that as long as there is ANY money available on the card (even $1), they can fill up. (The reason for this is that the pumps only send an authorization request for $1 to validate the card because they don't know how much gas you are going to pump. If it account checks out with $1, you get the gas.) So one of the classic signs of credit card fraud that the Fair-Issacs models score as very likely fraud is repeated charges at gas stations.
The credit card companies have responded by capping the amount you can charge--usually $50 or $75, depends on the company. That limits their losses.