I have until Jan 30th to spend an additional $3K on my SPG Biz to get the 100k SUB. Between storage fees--real estate taxes-- and an upcoming $900 repair to my vehicle it won't be a problem. But my APR on that card is 26.99% (their highest) and I'll let them make a little bit of $$ off me--but I'm not going to get killed with that interest rate. My question is: Would AMEX get sore about me transferring a large part of that balance over to one of my many cards with a low BT offer on the table? I searched the forum and couldn't find any info about this.