I'm almost always up for mdc, but not this month, because I really want to focus on the Watchlist. If mdc was on the watchlist (which we already did), then I'd participate.
However, there are many who participate in mdc. One thing we need to remember that although an activity isn't as popular as it once was, such things ebb and flow. If MDC is regular, participation will eventually go up, or if it doesn't, it's time to end it. But it is a solid idea, and like PA says, it doesn't require much commitment. I'd hate to see it fade away because we only have seven participants or so... seven isn't so bad.