Pocketbuster or Blockbuster?

The picture of a "Transformer" robot was enough to raise my curiousity over the Blockbuster promotion by TM recently which prompted me to make my way to a TM Service Centre to enquire on the possibility of upgrading the Streamyx in my home.

The trip was not only enlightening on the what and how of the promotions but rather shocking!

Why?

The price difference between the in-shop laminated promotion brochure as compared against the advertisements in the media and brochures printed by TM.
Why is this?