This is interesting but I am not sure how it works. Presumably only for online shopping, and MC shares it’s insights with the vendor to nudge up (or down?) prices to make you buy?
I rarely buy much. I research online, then visit trusted local suppliers. Specialty stuff online, sure, but otherwise local unless the price differential is astounding. Bought a mandolin today at Gourmet Warehouse in Vancouver. Hoo-ee! that Thing is amazing! Did zooks, onion and mushrooms in a minute.