There’s an interesting question there about when this form of advertising becomes obsolete.

Uber is in a very different position than many other companies. Anyone who browses the internet with regularity is already aware of their existence and probably just needs the right set of circumstances to come together to make Uber useful to them.

I suspect the results would be different if Uber were earlier in their adoption curve, but maybe that’s not true either. Maybe they’d be ignored for different reasons at that time.