No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
I was getting a different color mailer from Discover 2-3 times a week before I finally bit and applied. If they see something in your SP profile they like, you'll get tons of mail from them!
Does Discover ever do sign up bonuses? I have not heard of any if so.
Discover wastes a ton of bread on postage. I don't know what it costs them to mail out one of those colorful envelopes, but it's got to be $1+ so for those that they're sending 2 a week to they're throwing away $100/year. Times how many people? Pretty crazy when you think about it.
Doubling the Cash Back at one year on Discover it is like a sign on. Actually smart way to do it from the view of the CC company, the more you spend the more the CB the first year. My wife will be getting about $300 in May, her Disc it anniversary date.
I'm STILL getting sign-up mailers from Discover three weeks or more after I was approved for a card. I think their software routine for telling when somebody has taken an offer so you can stop sending them mailers has broken.
OP, wanting to attract a reliable, profitable customer is not "acting weird." it's their business model!
your gf probably hit the discover radar from multiple channels and hence the many mailers.