Product & Growth · Platform Strategy · Hard · 35-45 min

E-commerce Giant — Sustaining the Flywheel

Last updated 2026-07-29

What is this case about?

A large e-commerce platform built its dominance on a flywheel: low prices and selection draw customers, customers draw third-party sellers, scale lowers cost, and the loop repeats — with logistics and a high-margin cloud/ads business funding it. Growth in the core retail market is slowing and regulators are scrutinizing how it treats third-party sellers. Leadership wants to know where the next leg of growth and margin comes from. You advise.

Where strong candidates start

  • Map the flywheel and the profit pools — thin-margin retail vs high-margin ads, marketplace fees, and cloud
  • Identify where growth is slowing and which parts of the flywheel still have runway

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