Originally Posted by Gunmaster51
I think this is what happened. It seems to be back to normal now on Amazon.ca. Tried pre-ordering Sonia Mania: Collectors Edition and the discount applied. Also applies to AC Origins Deluxe/Gold edition. All standard game pre-orders also receive the discount.
Like you said, I think they intentionally disabled the 20% prime discounts during E3 period so people wouldn't be discounted twice on the same sale (the E3 discount+prime discount).
I'm not getting the discount for Wolfenstein II CE.