The most obvious form comes from the good old (bs) saying that 'the real price is what the buyer is ready to pay' (feel free to correct me here as to actual form of that).
Hiking up price to a drug (the shkreli story) would be an exploitation and not a 'normal economic transaction'.
So would be buying time of some poor workers in China for a dime. And then selling what they make on a 10x margin and pocketing it. There's nothing economic about that, its plain old theft (or deceit, whatever you want to call it).
There are more subtle forms, like apple spreading bs about their products being 'the best' and them having a 'vision' and then some uninformed fella buying stuff they make when its sometimes twice the price for objectively comparative product. Like always the devil is in the details.
This is all highly endorsed by the 'greed is good' model and it won't stop until we denounce it. No amount of government regulations can change it, snakes will always find a way. It's all in people's heads.