Auto CLI from Simmons First

So, I've had this Simmons First Account, opened end of 2013.  I haven't used it for some time, so I put a $150 charge on it last month, then paid it off.  Behold, they just gave me a 37.5% CLI.  WOW!  It was my lowest CL, now second lowest, but still, it proves they do give Auto CLIs!!