Fake?! https://youtu.be/ydSf57SRtcQ

Not really. GPL is a left wing license. It literally enforces cooperation, and collaboration, which’re communal values, rather than individualism.

What do you mean by ‘succesfully’? Most actual socialist countries are under heavy sanctions/restrictions from capitalists, such as Cuba, Nicaragua, Venezuela. However, they do still provide affordable, and subsidised low-income housing apartments, schooling up to the University level without charge, and freely available healthcare. They also have a degree of planned economy, so unemoloyment isn’t all that high.