The graph is misleading. South Africa Naspers owns Allegro (1st Poland). Secondly, Allegro, which is polish Ebay, has almost whole market share in Poland, Russia, Ukraine, Belarus etc. and possibly that contributes to Naspers value.

There is no nk.pl (polish facebook, 50% market share). It was sold for 200m a few years ago.

Hard to compare valuation of private and public companies, especially in different places. Better graph would with revenue, profit, growth.