What the post means is that we took "vacation from families", not that we were taking "days off" in order to work.
Simply put it qualified as a working week including normally being paid etc, and on top of that everybody even got wube-paid food, drinks and for people who normally work remote, even hotel accomodation.
And even more importantly, it was simply a big exciting party for us.
Our office turned into a nerdcave where most of us slept for a week, we ordered food every day, and did pretty much nothing else than play the game and sleep a little bit.
And of course, all of this was 100% voluntary and we even had the game hosted online so people who don't live in Prague could join as well.
I hope that makes it a bit more clear <3 No, we are not a gulag.