How do you game the system? Economists like to write a lot of

papers on this subject.

The problem with calculating the average is the fencepost error.

Warning, majore simplifying assumptions ahead...

If you transfer 1GB for exactly 5 minutes, what is your 95% bill?

It depends on your timing.

00:00 Start transfer, Start measurement window

01:00

02:00

03:00

04:00

05:00 End transfer, End measurement window

Elapsed time 5 minutes, total bytes 1000000, or 3,333 Bps.

Bandwidth billed 3.3Kbps peak

00:00 Start measurement window #1

01:00

02:00

02:30 Start transfer #1

03:00

04:00

05:00 End measurement window #1 (500,000 Bytes, 300 Seconds)

Start measurement window #2

06:00

07:00

07:30 End transfer #1 (1,000,000 Bytes, 300 Seconds)

08:00

09:00

01:00 End measurement window #2 (500,000 Bytes, 300 Seconds)

Bandwidth billed 1.6Kbps peak

By knowing your provider's measurement windows, you could cut your

usage bill in half while transfering the same amount of data.

A customer with a relatively random usage (user's surfing the

web) couldn't do this, but a user transfering batch files on a

set schedule may see dramatic differences in their bill.

You can make the measurements more complex by using three windows,

or choosing three out of five windows, and so forth. Unless providers

or users are seeing real billing problems, there is little benefit

to the added complexity.