This is an easily debunked myth, for first-party direct bookings. Third party aggregators and package deals are shady as hell and do all kinds of tricks. But I challenge you to record a screen cast proving that you're seeing different prices for a direct booking for the same ticket (including fare class) just based on different browsers or profiles.
replyThis used to be fairly widespread a long time ago. There used to be fares that are restricted for sale only in a certain country's POS (I believe these are still alive in ATPCO) but not really used anymore.
replyI remember examples of round-trip ticket A-B-A costing $x in A, $x/2 in B (plus another fare for country C) for some city pairs, but I don't think this has really been a thing in a decade at least.
Are you only just finding out about dynamic pricing? It's still in full swing everywhere. If you want to witness it, the Chinese websites Temu & AliExpress experiment with this on nearly every item. Flights are exactly the same, and because you haven't experienced it shows you haven't caught it
replyI have done that at least a few times in the last few years and I've never found anything cheaper than Google flights then booking directly with the airline.
replyBonus points I'm not booking through shady websites like Expedia.