The ideal business model (from a user's point of view) for successful libraries like Pydantic, Ruff, etc., is like a foundation or sponsoring. But (almost) nobody pays for them (me included), so their creators have raised VC money, citing: 'We have xxM users and yyyyyM downloads per month.' Not to blame library authors here, they are trying their thing, which is indeed admirable. It's just that open source is difficult to sustain. Wishing them all the best
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