That's an interesting question. I imagine the person who spent the most is someone who had a data entry error in their logs. We sometimes see people entering their mileage in the gallon field (imagine 23,453 gallons). We are working on a system to identify these and mark them as questionable and remove them from the results. Once the algorithm is dialed in we will then validate data on submissions and try to alert users with a prompt saying "It looks like you might have put your odometer value in the gallon field."
Maybe we can run a report and filter out obvious ones for 2014?