My Citi DC 6 months completion comes by september. but i use to hit that CLI for "No credit report required options" every now and then for last 2 months. Every time it says, sorry no increase due to blah blah.
Today i saw that again. request CLI without CB pull. Hit that button providing some annual sal, rental information and it came back and said "You are approved for $1400 credit limit". Wow, thats not bad.
My initial CL was $2600. Now after approval, it became $4000. 
I regularly put $800 on this card monthly and payout around $600.
Now, my question, when will i be eligible for next SP CLI? any book of rules with CITI?