So what changed your asking? Well more suppliers to begin with and btc was a massive factor as people can sell anything they want and not have any financial trace leading back to them. Before btc it was either cash, bank acc or WU and all these led back to the seller. Nowadays as i said they have btc so this keeps people anonymous and more people have access to fake bank acc's not registered to their names. If you know the right people you can get anything, skys the limit cause there's always someone out there looking to make a quick buck. Also more suppliers overseas pushing their products on other countries especially Australia as they can make higher profits off us. And more people simply want in on the action and pleasure of making easy money. And finally, more end users.