An example of a predatory consumer practice in a game, would be to intentionally match make people who haven't bought equipment or power with real money VS people who have, as to create an underlying need and incentive to make the non payer buy equipment or power.
A real life example of predatory consumer practice would be selling you a car without completely informing the buyer of the history or faults with this particular vehicle.
By extension of the latter, selling you a sealed TCG product, wherein the consumer only knows they are buying TCG cards (a car), they do not know the detailed contents of the TCG card pack (maybe its faulty stereo system or its subpar maintanence), it's dishonorable and is only there to artificially jack up the prices at your expense, so that you have to buy many more packs (get the car fixed) in order to be satisfied completely.