Not sure of the exact number, but a majority of the folks I cleaned off the list barely got off the ground. Many of the people who remain have been around and active for quite awhile, plus there's some new faces on there. On a few occasions when I was digging around to check for activity, I noticed folks had powered down completely, therefore no RC, and the tokens are just sitting in the wallet. Some have been sitting there like that for years. So even if they did want to kick back and earn by consuming/curating... they can't.