Who: City of Wonder players on Google+
What: A Chrome extension that periodically checks the Google+ game feed and "helps" every friend that has posted a story
When: Relevant as long as Google+ keeps a game feed (i.e. a long time)
Why: Not only does helping friends in games have implicit benefits (friends sending gifts back, being more likely to help you, etc), but you usually gain coins or other rewards every time you help someone else. For Wonders, having your friends run this program increases the chances that your Wonder will be helped by everyone possible.