Anyone that is running servers for a large percentage of the time should be using reserved instances that are priced much lower than the on demand prices shown

Anyone that is running servers for a large percentage of the time should be using reserved instances that are priced much lower than the on demand prices shown here. For example for a small instance that runs constantly, using a heavy utilization reserved instance would cost $335.16 for a year compared to $700.80 with on demand pricing.