I've been reading all these posts about Discover CLIs the past few weeks and thought I'd give the LUV button a push. I was still about 3 weeks short of the 90 days I thought you had to wait from one CLI to request another one but thought WTH I'd give it a shot.
I received the dreaded: "We can't give you an increase at the moment but will review your request in the next 2 days."
Two days later I received an email telling me that I received a $6500 CLI that took me from 14K to $20,500!
I did run quite a bit of money through it the past 4 months or so with Christmas spending and some travel.