I was recently sent a new Discover card to replace the one I got in Nov. 2011. I thought it was strange for them to send a new card a year and a half later. The paper that came with the new card said that I would have 0% interest on any new purchases until March 2014.
When I called to activate the card, the rep I spoke with said they sent it to me because I hadn't used my card in a while, and she asked if there was anything they could do to win back my business. I said - increase my credit limit. [It had been stuck at 1700 the whole time, and I have other cards with much higher limits, the highest being 23,500.] I had tried for a credit increase on-line, and always got the "We can't process this" message.
At any rate, she said she'd be happy to help me with that, and I said I not to do it if its a hard pull. She said their CLI checks were always a soft pull, and she asked me what credit limit I wanted. I was worried about getting shot down, so I just said 4,000. She asked a few income and rent questions, then approved me for the 4,000. I was happy for the CLI but peeved at myself for not asking for more. I didn't need more, it just would have been nice. Oh well, 4,000 isn't bad. I still am not planning on using the card at least for a while, as I have some minimum spends to meet on a couple other cards to get bonus miles/points on them. But its nice to have a higher limit on the Discover card.