Makes sense to me actually. It's not just corporations and sponsors that all these other tickets have gone to, they mostly went to football fans, international ones but in this case also many germans. International general public ticket sales already started in february and ended in march, and the german sales were even before that, they ended in january. This is normal with tournaments and finals these days. Same with the World Cup, you can already get tickets now for the finals without knowing who plays. Not too bothered by it.
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