...About 11.5 BTC is the max amount of gold you can buy from there, on exchange it would be different but I'd rather choose official marketplace than an exchange.
I have also thought about this and I agree that many (including me) will choose the
Digital Gold Marketplace than the exchange, but as you can see liquidity is low compared to exchanges, so if you are a bigger investor and need a lot of
GOLD tokens, then there is no other way as to buy on the open market.