Menards Coupon Policy

I never knew Menards had a coupon policy.  Thanks to Anita for posting on Creative Couponing’s Facebook page.  What I find interesting is this part:

Any coupons stating, “Not valid with any other discount or offer” will not be valid with sale priced items.

They also take competitors coupons…though who is their competitor? Would that just be Lowes and Home Depot or does that include anyone who has a coupon for a product that they carry?