Why doesn't Land's End care enough about saving money to not send three copies of its Christmas catalog to one single-famly house? Removing redundant rows in the database table should be straightforward...

In other junk mail news, we congratulate PetMeds on successfully cross-referencing the name of America's Silliest Dog^TM with our first names. We acknowledge that we do give her heartworm prevention and tick repellent. The answer to why we don't also give her glucosamine is that we do--but that PetMeds' glucosamine price does not match Target's price for human-quality glucosamine.

Arbitrage!