FORTUNE - Dec 11 - The Grade, a new dating app developed by Snap Interactive, gives users a letter grade, and kicks off anyone who earns an “F”– which turned out to be 5% of its early users. The app launched last month. “We want to hold users accountable for their behavior,” says Cliff Lerner, CEO of Snap Interactive. “We believe the next big thing in online dating is accountability.” The grades are determined by an algorithm that looks at everything from grammar to how often users respond to messages. Overall grades are calculated based on the profile quality, responsiveness, and message quality.