DAZ3D apparently, after 5 months, has now charged me $8 for a new month of Platinum Club, despite:
1) my Platinum Club membership having been canceled for 5 months. At request. And that took weeks to sort out.
2) My NOT ordering it at all.
3) My credit card profile having been deleted, which implies they still have the damned thing on file.
I filed a support ticket. I guess I'll be asking my bank to issue another credit card (at $20+) once it's resolved, and THEN telling DAZ3D that my account needs to be canceled completely.