Originally Posted by gleff
They've told me that they can't move credit across from a Plat CHARGE card to an SPG CREDIT card.
Makes sense! I have always moved credit line from a CREDIT card to a CREDIT card. Until this year, I never HAD a CHARGE card.
Best advice I can give you is to try to run up to your credit line on SPG once every six months and wait for the automatic credit line bumps (if they happen to you like they did me). Or ask for a credit line increase.