According to current statistics most gas refills are done with some sort of rewards card in tandem (Kroger Rewards, Meijer Rewards, etc). To some perspectives,

According to current statistics most gas refills are done with some sort of rewards card in tandem (Kroger Rewards, Meijer Rewards, etc). To some perspectives, those are also "apps" of a sort that feed the station owners email addresses and other tracking things.