You may want to check through recent posts on dw_news, which are happening a couple of times a year on average, and highlight various issues, some of which are relevant to your questions.

Reading through at least the top-level comments is useful - people often bring up other questions there and when possible someone (often denise) gives at least a brief answer. (Some stuff is "put that in a support request, please.")

(Short on time and well-behaving Internet tonight, so please accept this 'wave in the right direction' rather than my digging through for specifics.)

I'd also note - and this goes for denise and mark, but also lots of other people - that visible posts in someone's journal are by no means a complete picture of activity on the site. A lot of people may post differently than previously (people's lives change over time), and that may mean more posts in direct response to specific issues, in DW communities rather than their journals, in locked posts, etc.

It's not that "how involved are these people and what does that mean for policy?" isn't a potentially useful question, but "when was the last post in their public facing 'owner of the place' journal" is not a fantastic metric.