According to the world’s biggest social network, Yandex has violated its policies.

In May 2012, Facebook updated its platform policy, banning any Facebook data from being indexed by any search engine without prior written permission. 

But the real reason could be fear of competition. Wonder is a rival of its own Graphic Search functionality it recently unveiled. 

Yandex insists Wonder is not a search engine, but a personal assistant which helps users browse information.

 

 

Sources: http://www.rbcdaily.ru http://www.gazeta.ru