This isn't a credit card error. This would be like signing a contract with Sprint for 500 minutes a month for $20, getting charged the $20, and then being charged an extra per-minute fee that wasn't in the contract.
Kind of like when you get your latest Comcast bill, Sprint bill, natural gas bill and see that "effective $DATE we will be increasing our price by $X% due to $Y". Happens all the time unfortunately.
It doesn't happen like that though. Natural gas, sure. Power bill, definitely. I've never had natural gas or electric service where I entered a contract for a service at a fixed price. My cable and cell phone service are on a contract, they can't increase the cost during the contract period.
Maybe I misunderstood, but this doesn't sound like a credit card error. The charge was intentional. The stated error was failing to notify some people. The actual error was thinking that you can charge people's credit cards without their consent just because you gave them notice.
The 71 people affected were early adopters and had been enjoying Instacart's service for quite some time. I live just outside the area, and with 3 kids and both me and my spouse working, it'd be a godsend to get this service (right now we subsist on the occasional foray to TJs, Sprouts + Safeway deliveries when my parents are around to receive them). Safeway is costly and limited in choice. Our supermarket weekly spend is well over $100, so a single $99 charge might go unnoticed for a while.
If I had the service I'm not sure I'd be ready to quit over a $99 unless my inquiries met with bad customer service.
