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Nightshade, the free tool that ‘poisons’ AI models, is now available for artists to use
(venturebeat.com)
This is a most excellent place for technology news and articles.
It obviously benefits Meta by hindering the competition and by giving them another source of income.
As to OpenAI, I expect that Microsoft could supply them with quite some user data but I don't think OAI would be a major beneficiary, at first. OpenAI is, after all, a comparatively recent start-up. I think the biggest immediate gains would go to the established Big Tech firms that have their fingers on a lot of user data.
Major content owners, like the NYT, would be able to sell their content again. They have that lying around anyway, so it's pure profit for the owners. Corporations like Getty would also be able to make a killing, not just for being major content owners, but also because they are in the business of ensuring the "provenance" of media. If it's necessary to ask everyone and keep proof on file then they got you covered, for a price.
In the long run, I would expect companies like OpenAI to come out on top. They have their fingers on content generation, so the inequalities would just compound.