I dunno if that's what its "for," but it's quickly becoming a point of differentiation between their competitors, if it hasn't always been.
It's likely that having a lot of cards with annual fees attached to them, plus not being an easy target by those manufactured spend weirdos, plus having a fairly high "minimum bar" for customer quality means that they've got their customers' backs an inch further than Discover does.
For comparison, Discover gave me a ~$20,000 credit limit when I was 19 and didn't have a job. Now I'm 37 and have millions of dollars in the bank and I had to call and argue with AmEx before they would approve my application for their entry level card.
It's likely that having a lot of cards with annual fees attached to them, plus not being an easy target by those manufactured spend weirdos, plus having a fairly high "minimum bar" for customer quality means that they've got their customers' backs an inch further than Discover does.
For comparison, Discover gave me a ~$20,000 credit limit when I was 19 and didn't have a job. Now I'm 37 and have millions of dollars in the bank and I had to call and argue with AmEx before they would approve my application for their entry level card.