Yes, the thread is full of duplicated questions. But it's no wonder if half of them are unanswered. Plus when questions are scattered across such a big thread, it's hard to track them down. Plus there are also unique questions no answered. Jaxel said himself that XenPorta is unsupported because it's free. It's his good right. Nobody is entitled for support.
I believe it's better if there are dedicated forums for the biggest addons.