technology that they use to induce drivers to enter or exit I think we can get we can bisque and get a lot more interesting but let me tell you what this is basically the point that that we make here is that we think of drivers is making decisions on just a substantively different time scale than passengers okay so if a driver is thinking about whether to drive for example in the early days of lyft you know you had like a booking calendar when you would essentially say like when you wanted to be on or off the platform