Originally Posted by CerealCardSpender

It's possible there is some psychology behind it. While only being $300 added risk for chase, it might have been proven internally that the odd numbered credit lines get higher spending or carry higher balances. Banks are funky like this. They will turn around and give everybody and odd numbered credit line hoping to collect more interest if they noticed that odd numbered credit lines were more profitable than even numbered.

I remember hearing something similar about why some banks push bill pay services so hard. Apparently some banks noticed that customers who use bill pay are more profitable. So the bank turns around and paid customers who were not using bill pay to use bill pay via promos (i.e get $15 for paying two bills using our Bill Pay service). Of course it was nonsense, but the banks are funky like this.