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Of course, it wouldn't be applied to commentaries. That would indeed increase spam in the comment section. But would be a great rule since it would for some time stop spam in created section (until there are more users). People would have to go through bigger trouble to post spam posts and curators would have an easier time reading through new content. The current system seems unholdable if there are say 100000 active users. With 6000+ plus active in last 24 hours one can't read more than 2% of newly created content in his active time ​and curate it.