https://en.wikipedia.org/wiki/Neo-Riemannian_theory is a bit lacking of a simple explanation, but the basic idea is that chord groups (e.g. Minor chords) are represented as a algebra (e.g. x, x+5, x+7)

and then the chords can all be mapped on a big torus (donut) to represent transposition, and each chord connects with 2 others that just so happen to correspond with 'complimentary' chords from traditional music theory. And there are also different ways to connect to other chord groups.

Beethoven's 9th Symphony famously traces 19 of the 24 possible chords of the torus, and remember that he was partially deaf so relied on vibrations.

More interesting that all this however is a new instrument called the 'Fluid Piano' which doesn't restrict itself to Western tuning (multiples of 440Hz etc.) Check it out https://www.youtube.com/watch?v=t7Cq3pbcMkI

Music from the country Georgia can't be represented using on traditional musical staves. I'd be fascinated to understand how so different musical cultures developed, particularly in relationship to how our brains might have evolved over the year to regard certain frequencies and melodies as delightful, eerie, etc.

After this experience I began to trust this form of targeting but still think 'retargetting' is annoying (I publicly stumped one of the execs at Adroll when I asked 'why do we need retargetting?')

I personally would adapt to something much much simpler than guessing thousands of page views sharing thousandths of pennies.

KU subscribers pay £10 pm for up to 10 books at a time. After the commission just share the remaining £7 amongst the other books held during the month. None of this funky pageview stuff.

That way the scammers would only be taking from their own subscription fees.

Edited: The Google channel may just be a rare exception, I've not sure about how the notifications are triggered but it may be unfortunate that the urls contain both "google" and "acquire <4chan>" but then just links to a a google search result.