I guess so lol
Yes, high revolving can easily result in bank's closing your credit card account. In addition since they're private, they have the right to not give u a reason. Just like I can tell anyone to get off my property without a reason (weird example but u get the point). But good for you, 31K off is great. I was once 11K in the hole and learned the hard way as well. Keep up the good work and it will always pay off.
I love how it says you're a new visitor to this forum but you registered 4 years ago. lol