There seems to be a cap per local area. My area hasn't donated any money for the past week or so. It just says a thank you will be given to the driver. I presum

There seems to be a cap per local area. My area hasn't donated any money for the past week or so. It just says a thank you will be given to the driver. I presume it's because enough people used it to max out the allotment in our zip code(?).