For what it's worth, the community servers actually can - and in fact are - hosting for this event.
The problem is that there are only so many of us while there are thousands of people wanting to do the event, so most of the time, you won't get in one. The Dedicated Server stats list is everyone who has hosted before, not everyone who currently is. This is basically the servers of everyone who hosts consistently:
https://conclave.uasclan.net/
To give you an idea also, across all of my servers I host, I typically see around 4000 unique players a week since crossplay happened. In comparison, I have seen over 10000 unique players over the past day just on my event servers alone. There's a lot of competition for spots going on!
There is also an issue that essentially breaks the servers sometimes right now until they get restarted, so that doesn't really help either (I'm already talking to one of the devs about it and trying to help knock it out).