Some sites, to free up their mods will have a certain process.
For example, your first three articles are subject to human scrutiny. Those who can write well will be ‘elevated’. After those first articles, having proven their ability, subsequent items by that writer would be published immediately, without moderation.
Those writers ranked as average would be subjected to A.I. Moderation,spelling, grammar, and those which ‘pass’ would get a human eye. Those which ‘fail’ the spelling and grammar test would be rejected.
In this way the moderators have less work. They would scan various items which appear on the front page, just to be sure they deserve to be there, but their work load is less.
This means, faster publication for good writers, getting their work out there and earning as quickly as possible.