When you do have some time to waste it's rather interesting to go to the G2G members list and go down to a few pages with very low numbers and then look at each person's activity both contributions and G2G. Many members have absolutely no activity, some have a few contributions and a surprising number have large numbers of contributions, most likely from entering a GEDcom (I assume they get credit for contributions in the same way as if they'd entered the profiles by hand). It might be useful for someone to try to contact some people from various categories to see why they haven't continued. That said, there are a lot who putter around year after year but don't post on G2G often if at all.