Only 22 clans participating. This is very understandable, if my clan can be used as a case study:
TL;DR clan needs to be able to sign itself up without needing each individual member to sign up (do it clan wars style)...I pointed this out about a month ago, the last time WG failed in an attempt to get clan tournaments going.
2 days ago:
me to one of our clan wars officers: this tournament sounds interesting, should we do it?
him: sure, I'll start a team. (which he does. of the roughly 10 clan members online at that time, 4 decide to join the team.
1 day ago:
I look at the list of people on the team. Still only 4 members. 2 times during the day, when roughly 20 clan members are on each time, I mention the tournament and provide the link and password.
nobody signs up. While I'm in battle, someone asks what the password is, without looking 3 lines of text higher for the answer. When I get out of battle, that person is no longer online, and hasn't joined the team.
Today, I'm at work. I get home, registration is closed, still only 4 members on the team; failed to get entered.
You see, WG, only the best of the best clans have anything resembling order in their ranks. And even they don't have most of their players online at the same time the majority of the time. So, it's really hard to tell everyone in the clan to sign up for something, and then hold their hand through the process so they actually do it. However, if on any given Monday or Wednesday night you looked at the number of clan members on, you'd usually find fifteen or more, and they could maybe even be convinced to fight in a tournament that just so happened to be going on then. That's how clan wars works for us, and if this clan tournament thing were to be viable it would have to be the same way. And, I think we'd definitely prefer tournaments over the global map, since its very hard for a mid-level clan like ours to hold any territory long enough to get any gold from it (our treasury has something like 4k gold from a full year of futile global map activity...and we're, like I say, a mid-skill-level clan. Global map continues to be useful only to high level clans, but I guess that's a topic for a different post.