[mental_]

It doesn't seem very consistent. Lots of points in Latin America but when you zoom in, they are all gone.

[notatoad]

I think you're just seeing a poor design choice: the purple dots they use to indicate cities with bike shares are very visible at the whole-world zoom level, but virtually impossible to see when you've zoomed in because they're the same size and in the same location as the map's default city marker.

[dep_b]

Rosario Argentina seems pretty up to date looking at street level. But the city markers just disappear.