Yeah, the circular file is the place for all this junk mail.
For credit cards in general, hey, I just have one VISA card. That's all I've needed since I first got it in 1966. VISA doesn't like folks like me who carry no balance past the closing date. How sad, too bad. Scroom.
As far as credit score, all that matters is outstanding balances, income and assets. Where credit cards can hurt somebody is if the outstanding balance keeps climbing and climbing. But anybody that stupid oughta have a low score. It's sort of a grade in Competence 101.
Art