Backstory: Some successful open source projects end up getting funding through donations or custom service/implementation. Often times donations are done through patreon or "buy me a beer" link. Developers love stickers, how about selling stickers at a premium to support open source projects?
The Idea: Sticker platform to support open source projects.
Deep Dive: You could partner with sticker mule or another sticker company to provide high quality stickers. You would charge a premium and you would market these stickers as a "premium" and "exclusive."
The goal would be to make these stickers seem like a badge of honor to entice users to order them.
Validation: Have you seen any developer's laptop? We love stickers.
Monetization: You would charge a premium for each sticker and you could take a small cut to cover operational costs.