Rome Bus tour - Bad promotion example

They offered us a a 2 day bus ticket for 30 something euro but the 24hour bus ticket was 17 euro. There was no incentive for us to buy the 2day ticket as we could see all we wanted in the 24hours. In order for this to be successful they need to have a substantially cheaper offer to entice people to take the 2 day offer instead of the 24hours one.