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The Lack of Compensation in Open Source Software is Unsustainable
(trstringer.com)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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tbh there will always be demand for free work, these small libraries that people don't support seem like free code to me that corporations can write themselves relatively easily.
There are plenty of options and case studies for how to do this, in particular tidelift (which was started by a legit open source contributor) is one option, people manage to raise money using open collective and offer incentive through patreon (vue.js is a good example).