Website terms unenforceable due to unlimited right to amend

Website terms unenforceable due to unlimited right to amend:

"The US District Court for the Northern District of Texas has said, though, that Blockbuster cannot rely on any of its terms and conditions because a clause allowing it to alter them creates too much uncertainty for customers."

It would be interesting to see if, by extension, this ruling could apply to credit card companies that have allegedly changed interest rates, fee structures, and penalties without appropriate notice.