Yeah, this is a frequent trigger for many (read almost all) lenders if you're maxed out for a long enough period of time.
Sometimes rather than shutting you down completely, they'll do something even more, in my opinion, harsh. They'll wait quietly until you make a large payment on your maxed out card and then slash your limit to just above what your remaining balance is. Then you make another payment, and you get another CLD to just above your balance. This can continue until they have slashed your limit enough to put them at ease or until it's low enough that they just close you down outright. This is called balance chasing and it is not pleasant to be on the receiving end of it!
