Why Growth Channels Stop Working: Spot It Early.

Five ways a loop stalls.

First, your channel fills, so the next person costs far more than the last. Then an algorithm or platform rule shifts, and last year's method fails in March. Also, a rising customer acquisition cost can pass what customers are worth. Nothing breaks, because the loop keeps running unprofitably until you recalculate.

Why growth channels stop working without warning.

Sometimes the output stops feeding the input. Customers still buy but no longer refer, and content exists but is not found. So your circle becomes a line while revenue holds steady. Then compounding runs backwards, making each turn smaller at the same speed. That is why growth channels stop working before you notice.

The Prusa lesson on one loop.

Relying on one marketing channel is the risk you cannot see from inside. Prusa Research grew on product quality and reputation, one very good loop. In 2018 Deloitte named it the fastest-growing technology company in central Europe, at seventeen thousand per cent. However, roughly ninety-five per cent of the desktop market went to Chinese manufacturers, leaving Prusa about five.

Their loop never stopped working. Instead, something outside arrived at a scale it could not answer.