I started with 3k and while the increases started small, they have been getting bigger and I have had the card almost 2 years. Right now I am at $6100 and I think I should be getting another CLI soon based on past performance. Of course now i have not used it in a month and its paid off. I am not going to use it for another couple of months while I pay off the USAA card and start with a fresh slate. The last increase was $1k just FYI