Davidson: That was the requirement, no duplicate messages in the same hour, not within an hour of each other. It is a lot easier to implement, and the case the customer almost always wants to solve is not sending the same message at 1:00:01, 1:00:02, 1:00:03, 1:00:04, 1:00:05, and so on. If you were to send a very similar message once an hour, that would seem like you specifically chose to do this. This was just an easy way to make sure it worked—changing it to longer than an hour would be easy too.