I've developed the following formula based on my own experience:

CGB contribution = (120mins/story * (Numbes of stories) + 30mins/fanpost * (Number of fanposts) + 15mins/fanshots * (Number of fanshots) + 1min/comment * (Number of comments)) / Number of days since joining CGB

Each coefficient is based on the average time I spent developing stories, fanposts, fanshots, and comments.

The following is a contribution snapshot of CGB mods & Hit Squad on Boxing Day 2010:

Click here for a larger version. Misc column sums up CGBers' Fanposts & Fanshots posted on other SBNation blogs.

TnH leads in mins/day at the moment but Avi is catching up fast.

Atoms is doing quite well providing commentaries only.

Yours truly is comfortably contributing less than 10mins/day to CGB.

How much time do you contribute to CGB on a daily basis?