Other North & South America Frequent Flyer Programs - Priority Pass Didcount/invitation codes

A shot in the dark I know but does anyone know the cheapest way to acquire any one of the three memberships offered? I am aware of discounts offered by way of memberships with other organizations (not worthwhile unless they are of any direct benefit) but as I understand it, PP offer direct discount codes & if so, where are they offered in the application process?

Cheers.

i joined PP a while back via a google ad 10% offer - maybe try that? not too sure of anything else.