Handling file uploads safely
An upload form is the most reliable way to hand a stranger control of your buyer's server. Six rules cover almost all of it.
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Guides on buying well, selling more, and licensing your work properly.
Caching that does not go stale
A cache makes your item fast. A cache nobody thought about clearing makes it wrong, which is worse than slow.
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How long to keep backwards compatibility
Supporting old versions forever means never improving anything. Dropping them abruptly means breaking people who paid you.
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Price and quality correlate less than you think
Buyers read price as a quality signal. Sellers should know how weak that signal actually is before relying on it.
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The long tail: items that sell two a month forever
Nobody writes about the item that quietly sells a couple a month for six years. That item is most of a good catalogue.
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What happens to a category when a platform dies
Frameworks and CMS platforms fade. The sellers who notice a year early are in a very different position from those who notice a year late.
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How we think about subscriptions
Recurring revenue is the most requested thing sellers ask for. Here is why it is not here yet and what would have to be true.
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What we check before approving a seller
Applying to sell is quick, and it is not automatic. Here is what the review actually looks at.
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What a category page tells you about demand
Before you build anything, one category page read carefully will tell you more than a week of guessing.
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