They mention their founder is Serb and they have employees in Belgrade. Maybe they know some of their employees are already renting a coworking space in Belgrade and would be happy to work together in the same space.

It can be seen as a combination of benefits given to employees (motivation boost) + marketing.

Random data point: I'm in the UK and have visited Serbia twice for Skiing and time in Belgrade. It was a cool place.

Can't keep Slivovitz a secret forever and Kala Megdan is one of the most amazing experiences in Europe.

You know what you are talking about :)

I’ve visited Serbia and also Belgrade and I had a great time there. Lovely people, great food.

It's great for motorcycling :)