Nasza Klasa (literally "our class", as in school) was crazy incompetent though. They had all social groups there - young and older kids, young adults, adults, even some elderly people - and they somehow randomly decided to focus purely on school kids, alienating everyone else. And since they were so bad at it, it became a meme, was not cool anymore and everyone left to facebook.

It's really a shame, I think it could thrive regionally until today . Big tech doesn't always win - for example also in Poland AWS tried and failed to win the market several times, because there's an existing platform that everyone uses already.