@Gargron Why not? A "wide audience" is still meaningful to people. If by "wide audience" you mean a "closed set of large numbers of people": consider a patron-like paying-members only area, for example. Now there's an economic way creative folks here can sustain their privacy while managing a "wide audience".

If by "wide audience" you mean an "open set", consider the benefit of blind-key rotation for whistleblowers and other people sharing messages of interest to the public with significant consequences.