You're right that there are categories of products that this absolutely works. When I buy clothes, books, media... even tech, then I probably will buy something related. But there are some "one-off" purchases that Amazon doesn't need to hound be about.

Dude it's a wallet not a coach purse.

I have multiple wallets. I have one I take on business trips that contains my work ID, American Express, business cards, etc. All stuff I normally don't carry with me. I have an everyday wallet with cash and my bank card and stuff I need everyday. And if I'm dressing up, I don't want to ruin the lines of my suit so I have a far slimmer wallet that just has my ID and space for one credit card.

I mean I'm not accessorizing with the latest seasonal fashions, but there are utility reasons to change the kind of wallet you're carrying for different purposes.