Reddit (spez) created that "landed gentry"[1], and was more than happy with its existence until roughly two weeks ago. It is Reddit's policies, procedures, and practices which created a first-come, first serve, seniority-based moderator role. Not the volunteers who stepped up and assumed that role, uncompensated by Reddit.
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Notes:
1. Actual landed gentry labeling volunteer labour they'd cultivated and created as "landed gentry" has to go down as one of the most audacious rhetorical distractions of all time. Or at least the past week.