How does it know which rows would be affected how when we have something complex? Even better: Is there a detailed proposal or a paper to allow me to gawk at the intelligence of other people? :)
This is likely because the author blocks access from non-Western countries, you're likely located outside the West (I am as well, and had to use a VPN to access it).
https://jon.thesquareplanet.com/papers/phd-thesis.pdf
This is the paper on which Readyset and Noria are based.