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Course Cohorts on WhatsApp as Infrastructure: Entitlements, Time-Bound Access and Group Sharding

A course creator with one cohort runs a group. A course creator with six cohorts, a launch funnel and a renewal community runs a distributed system whose state lives in a chat app: who paid, whose access ended, which notice went out, who answered the logistics question late at night. The content team usually notices last, when a buyer who never got into the group asks for a refund, or when someone whose access ended weeks ago is still reading every live class link.