Amazon reportedly used a secret algorithm to jack up prices — A new report details Amazon’s Project Nessie pricing algorithm::Amazon deployed a secret algorithm to gauge how high it could raise prices before its competitors stopped increasing their prices as well.
Iirc there was a guy in an iama last year where the guy tracked prices for plane tickets and found that there wasn't any "demand-based" pricing.
I'm fairly sure he was debunked though. My memory is a bit hazy and I refuse to return to Reddit to look for it.