Balance Transfer 0% for 12 Months

What is the logic behind? Maybank charges 0.5% p.a. for 6 months balance transfer and 0.75% p.a. for 9 months balance transfer BUT 0.0% for 12 month balance transfer?

So called "promotion" ends this 31 December 2011.

Click here for the Rate Table.

Click here for the form.