US Bank - U.S Bank - USBANK US Bank seeks to keep your credit score low and dependant on their corporation Internet

Some time ago US Bank approved me for a unsecured line of credit with a very tempting APR and a 20k credit limit.  I did not use the account right away and nothing changed.  After beginning to utilize the line of credit I paid on the account for a few months always making immediate payments online at US Bank dot com always on time and more then the minimum.  After paying off and closing higher rate accounts and being very careful to make only large transfers and following all other guidelines to maintain the low APR I thought I was doing well.  Soon US Bank called and offered my quote overdraft protection for both of my checking accounts, the marketer was very convincing it is after all a quote good idea.  So I was given two quote overdraft accounts with 2k limits which turned out to really be more like additional unsecured credit lines with 20% interest.  Remember I was maintaining carefully my 3% interest on my initial large credit line.  Now for the trap.  I had a very high credit score and was making all of my payments on time on all of my US Bank accounts.  After making a large payment one month I guess they were sick of my perfection and they reduced the 20k credit line to my balance on the account somewhere around half.  This destroyed my credit line amount used ratio hurting my credit and leaving me unable to draw anymore money from the credit line.  I made another payment the next month, another large payment hoping to bring my score back some, of course they lowered the limit to my balance again.  So again this the third month in a row, you guessed it, another large payment to attempt to save my good name and yet the lines limit lowered to my balance again!  I guess I could always use those 20% accounts they were so nice to give me right before destroying my credit score leaving my unable to obtain credit elsewhere.  Of course they were nice enough to notify me of these changes with official looking letters with some BS excuse of why they quote had to take these actions.  I guess that is the gotcha and they gotcha me until I go pay off the credit line and close all of my US Bank accounts in the morning.  WATCH out for US Bank they will use this predatory lending trickery to try and trap you into a very high interest account with no way out.  US Bank is dangerous and needs to be investigated by the proper authorities to determine if this is legal.  I guess they have all the stuff they need buried in the fine print but people need to be warned!