I have another reason for a 24 hour help span that would increase the game experience. Because there are many time zones around the globe, it is impossible to help some neighbors. And have them benefit from that help. Example I have watched my help notifications trying to see when my neighbors are on line.
Knowing that helps me figure out a time frame to lend a hand, so they could collect goodies at a higher rate. All well and good, but I'm on the east coat, for the folks overseas or on the west cost the 8 help time span is a huge hill to get over. Sure I can lend a hand and grab some coins, but I am lending a hand because I want them to receive a benefit, otherwise what's the point? I encourage the game gurus to bump the help timing to 24 hours.