I applied for the Blue Cash Preferred in October 2017 and was approved for a modest $1,400 limit. I put quite a bit of spend through it the first couple months while spending toward the sign up bonus ($200 if you spend $1000 in the first 3 months). I put my power bill on the card, and a few other bills since my grocery spending alone probably wasn't going to do it.
In December, I requested a 3x CLI to get it to $4,200 and was approved. Since December, I've had almost exclusively grocery spend through the card, typically under $500 a month and PIF each month.
When Discover started their grocery category in April, I switched to using Discover because I'm still within my cashback match year, so it was effectively 10% back instead of 6% back. I put maybe $50 on the BCP in April, and nothing on at all in May, ending with a zero balance for the first time. I wanted to get a check for my cash back, and customer service said that the way to do that was to redeem the cash back for statement credit while your balance was zero, and they'll cut you a check when the statement hits. I got my $125 check last week. 
I started to worry that they wouldn't grant me a CLI if I wasn't using the card at all, so I bought some gas with the card last week so that the balance wouldn't be zero.
This morning was 180 days since my last CLI, so I went and requested $12,600 and was instantly approved again!! My experian is currently 733, and it was 719 when I got the last CLI in December.
I'm extremely pleased with AMEX! I don't think any other card would have jumped from $1200 to $12,000 in the span of 8 months with just soft pulls! I'm so glad that I read about the 3x CLI on this forum, or I'd have never thought to do try it!
Congrats Congrats Congrats
This is awesome! Congrats!!
