A thought prompted by seeing instances growing and struggling to have enough resources. Then and now, people in groups trying to communicate something. Hardware became incredibly faster over decades, storage became incredibly more huge, and software bloat kept pace?
Usenet is mainly used for pirating these days. The invites are probably referring to indexers which are sites that post nzb files that tell your Usenet client which posts to download for a certain movie/tv show/ etc.
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