Well, with the taxi-times VKO 3 has on offer, especially for 19 departures, declining an anti-ice doesn't strike me as the smartest move in the business. Hell, we've even de-iced - and then, with snow being forecast, added Type IV as the taxi-time at that point was hovering around the 40-min mark.
A lot of weather can change in 40 min, and having to taxi back will make you look like a douche to the punters...
...but somehow I suspect that this wouldn't have been a problem.
It's their train set, folks - if you want to fly there, you play by their rules. If this comes as a surprise and infringes on budgets... well