The value of slop does approach zero, but as the time and money required to produce slop also approaches zero it takes very little incentive for people to keep churning out infinite amounts of slop. If it costs 2 cents to make an AI generated song and the EV on its Spotify revenue is 3 cents then it's worth doing if you can automate it. Meanwhile everyone making an actual effort, using AI or not, gets buried under an ocean of shit that nobody has the patience to wade through.

This is the principle behind AI-generated SEO blogs, the content is garbage that nobody wants, but they are profitable nonetheless.

I think that's naive - good luck finding the "superior" material when the marketplace is flooded with garbage. Amazon users are facing this exact issue at the moment with chatGPT generated 'books'. Users and site operators cannot scale up to filter out the low quality sludge being generated by AI.