100% YES. You will get your points since the system views coupons as a form of payment. And this is how I know...
After reading your post, I decided to take undertake a field experiment. Or as Barney from "How I met your Mother" would say:
CHALLENGE ACCEPTED!
These are the offers I used:
Attachment 261437
Note how the fine print states $X must be spent before taxes and AFTER all other coupons/discounts are deducted. Read on to see this is NOT TRUE! :)
I price matched 6 x $6 Lavazza ground coffee from Metro and used 6 x $5 coupons.
That is all I purchased in this transaction so the systems "knows" the coupons were for these products and not other items.
And yet, voila!, I received all my points!
Attachment 261438
So I spent $6 OOP, received $4.50 in PC Points, plus $2 back from Checkout 51.
Next challenge? ;)