Hi vhf, et. al.
I'm always skeptical of any new way to "grab" a slice of the market, and especially the PM market.
Easy credit, credit cards, no down payment mortgages etc. helped to get us into this mess.
Credit cards for owned bullion will separate some of the fools from their metal, but hopefully, most will heed the call and shy away.
If you are going to ship your bullion to a "safe house", trade via credit card in exchange FIAT, and pay interest, handling etc., why bother in the first place?
As I have said many times; if you are in PM's to make more FIAT, you do not understand Gold and Silver.
Good Luck to all!