like a Ponzi scheme in that it steals new data to augment the old data
No. Not only is that not a Ponzi scheme, that's not how genai works neither.
You can get new investments to improve how existing investments make money. That's how all businesses work. The fraud is when you get investments to pretend old ones are making money.
'augment data' is a meaningless phrase. It's like saying you augment plain rice by adding more plain rice to it.
Genai doesn't consume data the way taking investments consumes money. At no point is the data destroyed, they can keep generating without any new training data being needed. And it doesn't lure in new data by promising to return it with interest, it either steals it or pays for it with money.
You could say the money investments into the genai companies is like a Ponzi scheme, and that's the nature of an investment bubble. It has nothing to do with how genai works.