Marketplaces that allow you to give away free stuff should let you charge if people don't show. It's free unless you don't come in which is $20. They're almost unusable as is because no-shows are so common.

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Tech entrepreneur. Founder @electricsql. Founder @gatsbyjs (acquired by Netlify). @kylemathews on Twitter

@ethglobal used to ask people to stake a very small amount of ETH. If they show up, the ETH is returned. All transparent and onchain.

They had a great show up ratio!

Building and publishing Farcaster growth playbooks. Chief builder @percs --> link.percs.app/chinmay.eth