Board Thread:News and Announcements/@comment-26036275-20150325211140/@comment-24577221-20150404175101

Perhaps the Glowbes will automatically collect all the coins and food and diamonds for you, even while you don't have the game running.

At a cost of 4 diamonds per 24 hours, or something like that. So the Glowbes would be encouraging players to spend diamonds, which is what BBB and BFG want.