Hmm... I suspect the thing is that it's an either-or sort of situation for quite a few of these people. They commit to going to a local game, playing or watching, every weekend already... Another game might just be eating too much into other commitments.
I think a primary problem that we tend to run into when we try to do these analysis, is that we seem to be looking for ways to get people to every game. A better approach might be to look to sell more of the 6-game-type passes, getting a bigger spread of people spread across the home games. If we could get 20000 more 6-day passes out there, we'd probably be seeing at least 15.000+ crowds at more-or-less every game.... 20000 is a LOT of passes, but I still reckon it's a lot more likely than 20000 full members
I would question too, whether commitment as such is really the issue in the clubs. Certainly, I know that the Rams are fiercely proud of Matty Simon... A pride that has definitely converted to Mariners support as well. Granted, that sort of pride isn't relevant to all of the clubs, but my impression is that every kid in the clubs has a Mariner that they'd like to be. Indeed, it amazes me how many little Matty Ryan's we have on the coast... When I was a kid NOONE wanted to be keeper
Certainly, I think the Mariner Mates passes have done their bit for the memberships as well... And those are the ones that will convert in the long term.