The article suggests that, since both companies are founded by Stanford grads, they have similar social networks and so are drawing on the same pool of talent.

The article suggests that, since both companies are founded by Stanford grads, they have similar social networks and so are drawing on the same pool of talent. I have no idea if that is true or not. My two cents are, "why do you think its just Uber?" Its cheap to add filters, maybe they have them for Google, Apple, Facebook, etc. Maybe having one for direct competitors like WhatsApp is a bit much.