Basically nowadays you can only run any warez or any site if you are capable to pay for its servers or hosting . Leaving few old forums, i guess most of the sites are just opened in sake to earn something from it but they can't even earn like 1$ in a month so they close the forum and then make mind to open up some warez blog when it gets some track but it goes down as the owner has no funds to pay for hosting , then after few weeks it will again come back but without any traffic as due to downtime loss. Its just regular process that can't be stopped till the owner is stable financially and mentally that he want to keep site running not in sake to earn from it but just for sharing stuffs .

I bet all big warez sites has already faced so many problems in starting but now they are earning 3 times more then they pay for there servers . That's the matter of stability