At Tobold’s suggestion, I have been trying My Tribe on Facebook. It appears to be a worse version of the standalone game, with time sinks that you can pay to avoid and an incentive to leave the window open so you can click things more often. I’m not sure what it is meant to add to the three Virtual Villagers games that preceded it, beyond the chance to cash in on Facebook a bit. You can show your friends your village, so if you think people will go look at your highly skilled villager or well-built island, there is that.
Am I missing something? After trying a bunch of Facebook games this past month, I purged most of them last weekend, and I struggle for any good rationalization of time in this game as “investment” rather than “sunk cost.”