see, that's why i asked for details. your last point about safety is an interesting wrinkle to consider. but i view your example (a $63 bonus for 34 rides) to

see, that's why i asked for details. your last point about safety is an interesting wrinkle to consider. but i view your example (a $63 bonus for 34 rides) to be more an incentive than a gamification because it involves real money, not simply "meaningless" points. ratings are more akin to gamification in my view because (1) they're not directly tied to an incentive, and (2) it takes advantage of our human nature of wanting to do well, especially when it involves how other people view us.