I maintain two apps. I haven't updated their status in months. Yet, I'm not removed. Apparently, this is because no other people added something to these pages either.
The problem, as I see it, is with the job of maintainer. It's really two jobs in one: you're a moderator of user contributions, and you're the page editor. Now, I don't really care about user contributions. I'll confirm them when they get in my inbox, but it's not why I become a maintainer of an app. The only reason I became a maintainer for those two apps, is because I wanted to add notes and howtos. Maybe that could be governed more like a wiki: anyone (who's logged in) can change the page, and every edit is listed in a changelog. Just like with wikis, you can 'watch' pages for changes, which is sort of analogous to becoming a maintainer. The comments would then be analogous to a wiki talk page.
Remco