very good comment in the post:

why most of holder of these contracts canot take physical delivery: because they are FRAUDULENT!

IT'S A BIT LIKE THIS:

You go on vacation and hire a housesitter.
when you're gone he sells your house, and rents it back.
You come back, and he keeps paying the rent.
you know shit but why would you? you still get to live in your house right!

and suddenly the new owner come knocking on your door to evict you because he wants to rent the house to his own kids....

now... who's house it it?

Well the law says it's still yours.
the one who bought is doesn't and loses also it's rent.

SO

Not everybody wants to expose the scam because if they know, they'll know their claim doesn't really exist and their rent income is in danger.

SO THEY SHUT UP AND KEEP COLLECTING THE RENT!!

Untill the one who sold the house runs out of money to pay the rent... and then the game is up....

Now you translate that to the gold market.
And you'll understand why nobody really slams on the table to get their gold or money back...