[Danski0]

It has been motivated at least in Denmark (limit was 1000, now 100) and Sweden (limit 500) that larger events attract people traveling to it. This traveling and being among large crowds large is what they want to avoid. While smaller events, say a local low division football team, doesn't normally attract a tone else than locals. The exact number is arbitrary but has to be something, right now 100 in Denmark, 500 in Sweden and will likely change over time.