Just returned from one final CC-load-run to a nearby Target. Loaded first $1k via new AmexBizPlat (150k offer - thank you @thaber). Load went through fine. Second load of $995 was denied, called up Amex CS and was ultimately advised that T&C's state you can't load RC with CC (how did they know?). This is after calling up Amex and preclearing the charges with them. They then said they will be sending me a new card bec of a fraud suspicion... go figure...