I can't help but think there's a bit of a difference between Dutch usage of a German airport and Russian usage of a Finnish one.
As has been pointed out, there's no visa issue between Germany and Holland. But more than that, as they're both Schengen countries, you don't even have to stop at the border.
Additionally, Holland and Germany share a currency. No having to change anything just for the hour you'll spend in your departure airport.
Finally, there's a language issue. Most Dutch people can speak German to some reasonable level. How would that work between Finland and Russia. I can't imagine any Russians speak Finnish; a lot don't seem to have any second language. Do many Finns speak Russian?
Now that Bratislava is in Schengen and the Euro and given most Slovaks speak German, it really is an option for Vienna. I doubt similar things can be said for many other airports near a border.