Thanks for update. (mainsite down again, so i may as well do this...

)
Mmmmm....I guess there are few players, (though they are active recently).
Im away for a week, when i return, ill see if i can get some new people and more on ideas and how to promote it. Obviously if not, then on present course its gonna fade away.
In the meantime, i think we can identify some "reasonably" different criteria between ladder and coloseum formats: (of course, they may not be equally relevant to everyone) but we may list them in case: I think its a good thing they are different.
1.
AET/boot is much longer for ladder. The coloseum time controls could be too short for some, EG. "weekend players" ( i often play midweek but only can "guarantee" time at weekends).
2. Surely one can in principle climb the ladder fast. Really, i got to play fdk and kam very soon once i joined in the ladder ...to get to play them in the coloseum will take for example, black-wave or kreugster (upcoming stars, ..he he) will take 4 or 5 seasons,
well over a year. If he gets ill or takes a super-long holiday it might never happen.
In the ladder, a player
can shoot up in weeks.( i think i might mention this fact to some of the newer guys with a lot of wins, they might be encouraged to join ladder)
3. The maps are different, and could be changed and be more different (!?).
4. There could be other differences, any ideas anyone?
Furthermore, I do think playing a "published/official" competition (with results, leaderboard/ranking, etc, shown in forum ) has some differences to playing friendly games..again this
can be different from one person to another, but for some it can be significant. Some Differences:
1. Some people are going to play differently in such games. Particularly the leaders who have something to lose. In Friendly games, one might experiment and take excessive risk, or play rather too quickly or be overly defensive or use some other non-ideal style.
2. Some top or experienced players have organised how many games they want to play and are not always open to offers of games.. perhaps just due to time. Also many (not all!) less experienced players can be shy about challenging such players, who are likely busy and you may not want to pester them. Well that was my stance/experience too. Perhaps i m too influenced by usual protocol in other sports (including badminton, chess...) .
Competition can pair up people who might not otherwise play.
I think there may be some more positive points for the ladder?