Community support tier
I'm a great believer in the tool and its open source potential in so many areas, but I mainly use it on a personal basis or for small projects.
I'd like to help finance it even though I can self-host it myself, I'd be happy to put money down monthly for this tool.
I can't afford a hundred euros a month, but I'd be happy to contribute between 15 and 30 euros if it would encourage and perhaps perpetuate this strong desire for open source :)