From what I can see, around 900+ members got banned accused of "plagiarism/spam", with a generic message and no source of what triggered the ban to make a proper appeal, appeal which will never even be addressed anyway.

Why aren't the ban messages including clear links pointing to what caused the ban as one would expect out of sanity? You are asking for people to appeal to some generic message.

On the log there's only "autoban" without any more details for most people.

Many valuable members got banned for life and we cannot contact them again as we only talked across PM. Banned for life for what's most likely some bullshit reason done years ago which does not justify a permaban weighting in the contributions for the forum. Unless you started an expert, everyone's posting history was pretty lame at the beginning. Someone in power that wants to harm you will find something across 1000's of posts to ban you. Since they don't need to give details they can freely banhammerize anyone they please, ruining your account for life and everything that it means for the people that spent ages here.

If you are going to permaban someone, at least have the decency to quote exactly what triggered something as harsh as a permaban.

This is most likely a tool for someone in charge to get rid of people they don't like anyway.