14 Comments
Aug 25, 2023Liked by Colin Gardiner

This is such a useful piece - thanks, Colin. I have a question...

Would customer support and developer costs be considered as COGS or variable expense? Or neither?

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May 29, 2023Liked by Colin Gardiner

Great read!

Wondering why you include acquisition costs in the contribution margin when they are closer to fixed expenses rather than variable / COGs? Thanks!

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Great points!

What are some of the key elements that contribute to variable costs in a marketplace ? Do you see emergence of AI and automation leading to fundamentally different dynamics in cost structures for marketplaces?

You spoke about some of the below

- Customer support,

- trust/safety, insurance, and

- acquisition costs can be massive costs for the business,

.... and the list goes on.

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Apr 24, 2023Liked by Colin Gardiner

Great summary!

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Great article! I noticed in the graph that the contribution margin in theory should be less than the gross profit. However, when I reviewed a company's data, I found that the contribution margin is consistently higher than the gross profit value. Could you explain what could be the reason behind that difference?

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Nov 8, 2023·edited Nov 8, 2023

Great article, Colin.

A big under explored driver for COGs is the payment fee (credit, debit, etc.) as you mention, which can vary massively and make cost predictions difficult. I'm building out a product in just this space for markeptlaces and platforms at the moment and I'm seeing many payments resulting in a net loss, often to the surprise of our customers.

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