I recently talked to the vendor " Dexon3D " on renderhub,
I asked him about pirate website sharing his product. ( I did not mention Zone )
He told me that several peoples contacted him to alert him of this issue, and that he found out that his products appear on zonegfx first and then spread everywhere on the internet.
He said that he understand why people pirated his stuff but that this was his only source of income and he is a relatively new vendor and that he cannot do much against pirates websites.
He told me that for his 2 first male character , he got a good amount of sale in the first month, but the sale started to decrease significantly after they where shared here.
But for his latest male character, which was shared here only 2 days after it went on sale on Renderhub and gumroad, he noticed that he lost 50 percent of revenue compared to his first characters. He told me that he is already considering stoping creating characters for Daz if this continue.
Personnaly, I think posting of new Item should be delayed by around a Month. I think that is the best way to give the vendor enough time to make a "good" amount of money.