In response to the new regulations which will soon take effect, AmEx is basically eliminating over-limit fees, even as the regulations do not require them to do so. This is a definite plus for consumers, but it's really more of a token gesture aimed at receiving some good press than anything else.
To make up for the lost revenue stream from over-limit fees, they are tweaking other aspects of their consumer agreements. I'm not sure how reducing a credit line increases revenue, but there must be some ecnomic reason for doing so.
Sometimes it's nice to be a fella like me. My credit's always been in the tank, and I can't even get a Capitol One card nowadays, so I really don't have to worry about all of this greed and nonsense.
Best regards!