I would say that the community is hibernating and not dying. Think of us fans as small animals, and non Bionicle years as a winter. The longer the winter, the more animals go to sleep. The animals aren't dead, they're still there, but they aren't making noise either. As soon as spring comes out, they all wake up. So I'd argue that while active Bionicle fans are getting smaller, the actual pool of Bionicle fans hasn't shrunk either. As evidence, there's still about the same number of Bricklink stores subsisting with lots of Bionicle as there were before G2 ended, and the ebay lots are still being bid on. Someone is clearly still working on their collection.