Kanye West has lashed out at developers who place in-app purchases in video games created for children.
In-app purchases are common in free-to-play games, which offer players a free experience and then charge for additional features or in-game currency.
The practice has received mixed response from the gaming community, with some arguing that the whole concept is deplorable, while others say it is a valid business model in some circumstances.
Some games only sell cosmetic changes or non-essential features to players, while other games ask you to choose between spending hours earning in-game currency, or paying real money to avoid the grind.
Most contentious in this category are pay-to-win games. These let you spend real money to receive significant advantages against opponents in the game.
West made no distinction between these different implementations of in-app purchases in his profanity-fuelled attack on Twitter.