In my case, I'm pretty sure their pattern is to take stuff that I do buy and try to encourage me to buy something else. Either the competitors or jumbo packs of those items. I only ever get two produce offers.
E.g. we buy Cinnabon bread, they try to get me to buy Country Harvest (which is owned by Weston Breads, the same Westons that own Loblaws)
I buy Dove soap, they try to get me to buy Olay (P&G is a big advertiser in the Loblaws "Big Brands" flyer)
Advertising is my pattern. I see through you, PC Plus.