Things like using surveillance to figure out when your payday is and raising prices (just for you, and just on that day) because you psychologically are more willing to spend in that moment
Because we live in a capitalist hellscape and the companies that implemented these tricks were the fastest growing segment of our economy for like 15 years (esp after the 2008 crash) so the government turned a blind eye. Now they control the world and are able to literally buy politicians
We let them and also you need quite a lot of skill to overcome it as it is a kind of a cat and mouse game.
And there's a end game of "tell us who you are or else we don't tell you the price, or we tell you only the 'highest price that nobody pays' "