The idea that individual source snippets at this scale diminish in aggregation, is undercut by the fact that OpenAI and MSFT are both selling enterprise-flavoured versions of GPT, and the one thing they promise is that enterprise data will not be used to further train GPT.

That is a fear for companies because the individual source snippets and the knowledge "learned" from them is seen as a competitive advantage of which the sources are an integral part - and I think this is a fair point from their side. However then the exact same argument should apply in favour of paying the artists, writers, coders etc whose work has been used to train these models.

So it sounds like they are trying to have their cake and eat it too.