Great. Thanks for sharing this success story. It would be interesting to know if the engineering team is motivated and understands the why they are building what they are.
As far as I got a lot.
The main reason is that, with limited effort, you see your progress (tasks move).
Moreover the management is really enthusiastic of the approach, so they're often showing to guests (like I was) and promoting the activity as something unique of "their guys", so I guess this also makes people proud of what they're doing...