Not sure what Whirled did (congrats, btw!) but I just called the number on back of card.
To the person that asked, Discover is rather stingy with CL's. Pretty conservative, but great customer service. So long as you don't count the gagillion times I was called and harassed about their credit monitoring service and the likes.
I am thinking about applying for another credit card for a balance transfer. I was thinking about trying with Discover but I don't know what the score needs to be and what credit bureau they usually check with. Anyone have any ideas. I am trying to get some information before I apply. Any help will be appreciated.
Depends on which state, they pull TU on most. Score around 680 is good enough. YMMV.
is there any way to opt out from receiving marketing pitches from Discover?
Yes. When they disturb your dinner in order to tell you about their wonderful credit monitoring service, just tell them that they should put your name on their internal "do not call" list. I did so, and that was the last marketing call I ever got.
Regarding CLI, I never asked for one and never got one. I hardly use the card, though.