Since I do not drive or use Waze for navigation I cannot see how this works for myself, but could it be that they put this there so that you as a driver have an opportunity to start offering to give people rides rather than taking one? As a person without a license, I would very much like to see more drivers in my area. I hope that Waze can find a way to encourage more drivers to opt in (and to do so without being obnoxious or intrusive) so that I could use the service more. So far I have been able to take only one trip in over a month of using the app because there are no matches found. I'm commuting in LA and it's hard to imagine that there are not more people whose commute is similar to mine.