I wasn't very impressed by the reporting quality in this article, but it seems as though there are some other reviewers of the book were much more thorough in their critique. Emi Nietfeld writing for Mother Jones has more detail and actually contacted some experts for comment: https://www.motherjones.com/media/2024/12/trauma-body-keeps-...
In short, most peasant farmers must sharecrop at least some of their land, and on sharecropped land, extraction rates are on the order of 50% (for basically nothing in return).
This reminds me of Zobrist hashing [1] in chess engines. In fact, if you split the sum into 256 columns (instead of 8) and set the prime to 2 for each column, I think it's essentially the same. I'd be curious to see some quantitative benchmarks and their results on performance + collision rates.