In Amsterdam they are commuting, and in a fantastic infrastructure where cars get red lights when bicycles approach on an intersecting cycleway. That's probably the main reason for safety and why they ride so much.
There's very few places where the light changes automatically for bikes in Amsterdam - all that I can remember now, don't. The large majority of lights do respond to input from pressing the cross button (also pressable by bycicles), but it's not automated.
They do use "change on approach" lights outside of the cities way more, but in cities it's usually only for trams and buses.
