Woohoo!!! It had been 6 months since my last CLI on my Quicksilver WMC so I thought I'd give it a shot, and sure enough: $2000 SP CLI!
I've been building this card up for a year and a half now. It started as a Capital One Platinum MasterCard with a $3000 limit, and it's now hit double digits with SP CLIs! That puts my total exposure with Capital One at $33000.
If anyone is curious, my spending on this card has been VERY light (no more than $50 per month, if that).