Well, that is clear enough.
A bulletproof way to buy points at 0.6 cents.

Unfortunately for me I bought a bundle of points
during the last round of PB announcements.
Thought it was OK as there was a 10% discount.

A few weeks later I see the points on sale for 25% discount.
Now with this, its same as a 50% discount.
IHG is making me feel not so smart.